Area of Real Estate Property Area of property (in square foot) Mortgage Notes Payable, Real Estate Owned Represents the liability for mortgage notes payable by the reporting entity in connection with the acquisition of real property in which the reporting entity had loan secured by the real estate property. Mortgage note payable - real estate owned Mortgage note payable - real estate owned Mortgage note payable Receipts on Financial Instruments Underlying Linked Transactions Receipts on financial instruments underlying linked transactions The cash inflow provided by financial instruments during the period, which are classified as Linked transactions. Investment [Table Text Block] Schedule of composition of loan and investment portfolio Real Estate Owned Properties, Number Number of properties classified as real estate owned Represents the number of properties classified as real estate owned by the entity, as of the balance sheet date. Period from Date of Acquisition within which Purchase Price Allocation of Real Estate Property Acquired is Finalized Period within the date of acquisition in which the entity finalizes the purchase price allocation of the real estate properties acquired Represents the maturity period from the acquisition date during which the purchase price allocation would be finalized by the entity. Mortgage Note Payable, Held For Sale Represents the liability for mortgage notes payable by the reporting entity in connection with the acquisition of real property in which the reporting entity had loan secured by the real estate property and held-for-sale. Mortgage notes payable - held-for-sale Apartment building Apartment Building [Member] Due to borrowers The obligation from funds furnished by a borrower to a lender to assure future payments. Escrow deposits may be received for a variety of purposes such as earnest money and contingent payments. Due to borrowers (includes $700,642 and $740,809 from consolidated VIEs, respectively) Due to Borrowers. Award Type [Axis] Secured Debt Repurchase Agreements and Warehouse Agreement Borrowings Repurchase agreements and credit facilities Carrying value, as of the balance sheet date, of securities sold under agreements to repurchase and the carrying value, as of the balance sheet date, of the outstanding borrowings under warehouse and revolving lines of credit. Total debt amount Debt Carrying Value, Total repurchase agreements and credit facilities Loss from continuing operations before gain on extinguishment of debt, (loss) income from equity affiliates and (provision) benefit for income taxes Gain Loss from Continuing Operations Before Gain on Extinguishment of Debt Net Income Loss from Equity Affiliates and Provision Benefit for Income Taxes Represents the gain (loss) from continuing operations before gain on extinguishment of debt, income (loss) from equity affiliates of the reporting entity, and (provision) benefit for income taxes. Transfer of real estate held-for-sale to first lien holder Transfer of Real Estate Held For Sale Value of real estate held for sale transferred to first mortgage holder in satisfaction of mortgage note payable in noncash transactions. Acquisition of treasury stock Treasury Stock Value Acquisition Equity impact of the acquisition of common stock that were acquired during the period. Amendment Description Extinguishment of trust preferred securities Extinguishment of Trust Preferred Securities Represents the non cash investing and financing activities in relation to extinguishment of trust preferred securities of the reporting entity. Amendment Flag Repayment of Due from Related Party Through Acquisition of Treasury Stock Repayment of due from related party through acquisition of treasury stock Value of treasury stock acquired to repay the amount due from related party in noncash investing or financing transactions. Represents the non cash investing and financing activities in relation to re-issuance of CDO debt of the reporting entity. Portion of the entity's bonds that were exchanged Re Issuance of CDO debt Reissuance of Debt Accrual of Interest on Reissued Collateralized Debt Obligations Represents the noncash investing and financing activities in relation to reissuance of CDO debt of the reporting entity. Estimated interest due through maturity Estimated interest due on reissued bonds Investment [Axis] Securities Exchanged Available For Sale Available-for-sale securities exchanged Represents the non cash financing activities in relation to the exchange of securities classified as available-for-sale. CALIFORNIA California Investment [Domain] Unearned Discounts Recorded on Restructured Loans Unearned discounts recorded on restructured loans Unearned discount used in lieu of cash to restructure a loan. Advances from Related Party Debt Borrower advances made by related party The borrower advances made by related party in noncash investing or financing activities. Amortization and accretion of interest, fees and intangible assets, net Adjustment for Amortization and Accretion of Interest and Fees Represents the adjustment for amortization and accretion of interest and fees during the period by the reporting entity. Noncash (Losses) Gains on Sale and Restructuring of Loans Loss on sale and restructuring of loans For a lender, the aggregate noncash loss (gain) recognized on the sale or restructuring of loans arises from the difference between the carrying value of the loan before the sale or restructuring and the sales price or fair value of the loan, net of payments received, after restructuring is complete. This element refers to the loss (gain) included in earnings and not to the cash proceeds of the sale or restructuring. Increase (Decrease) in Restricted Cash and Cash Equivalent Change in restricted cash This element represents the net cash inflow or outflow for the increase (decrease) associated with funds that are not available for withdrawal or use, which includes restricted cash and cash equivalent net cash. Loans and investments funded, originated and purchased, net Payment for Loans and Investments Funded Originated and Purchased, Net Represents the cash outflow during the reporting period in respect of payments for loans and investments funded and purchased by the reporting entity. FLORIDA Florida Payoffs and paydowns of loans and investments Proceeds from Payoffs and Paydowns of Loans and Investments Represents the cash inflow during the reporting period in respect of payoffs and paydowns of loans and investments held by the reporting entity. Principal paydowns of loan sold Due to borrowers and reserves Represents the adjustment in respect of borrowers' funds held by the company to fund certain expenditures or to be released at the company's discretion upon the occurrence of certain pre-specified events and to serve as additional collateral for borrowers' loans. While retained, these balances earn interest in accordance with the specific loan terms they are associated with. Due To (Due from) Borrowers and Reserves Proceeds from investments in real estate, net Proceeds from Payments for Investments in Real Estate Owned, Net Represents the cash inflow (outflow) during the reporting period from the acquisition (disposition) of investments in real estate owned by the reporting entity. Principal payoffs Represents the cash inflow during the reporting period in respect of proceeds from distributions by equity affiliates to the reporting entity. Distributions from equity affiliates Proceeds from Distributions from Equity Affiliates Retirement of Common Equity in Trust Preferred Securities Value of common stock equity in trust preferred securities retired in noncash investing or financing transactions. Retirement of common equity in trust preferred securities Collateral on swaps to hedge counterparties Collateral on Swaps to Hedge Counterparties The value of the collateral on swaps to hedge counterparties in noncash investing or financing transactions. Current Fiscal Year End Date Issuance of Warrants Value of warrants issued in noncash investing or financing transactions. Issuance of warrants Investment Interest Rate Fixed interest rate (as a percent) Loan Paydowns Received by Related Party Value of loan repayment received by related party in noncash investing or financing transactions. Loan paydowns received by related party Reclassification From Due to Borrowers Reclassification amount from due to borrowers to loans in noncash investing or financing transactions. Reclassification from due to borrowers to loans Payoff of junior subordinated notes to subsidiary trust issuing preferred securities Payment for Payoff of Junior Subordinated Notes to Subsidiary Trust Issuing Preferred Securities Represents the cash outflow during the period for payment by the reporting entity in respect of junior subordinated notes to a subsidiary trust issuing preferred securities. Summary of Significant Accounting Policies Significant Accounting Policies and Recently Issued Accounting Pronouncements Disclosure [Text Block] Represents the entire disclosure for all significant accounting policies of the reporting entity and disclosure of changes in accounting principles, including adoption of new accounting pronouncements that describes the new methods, amount and effects on financial statement line items. Investment in Equity Affiliates Shareholder Equity Notes [Abstract] Common stock Variable Interest Entities Variable Interest Entities Variable Interest Entities Disclosure [Text Block] Represents the entire disclosure of Variable Interest Entities and evaluation by entity of its loans and investments, mortgage related securities, investments in equity affiliates, junior subordinated notes and CDOs, in order to determine if they qualify as VIEs or as variable interests in VIEs. A VIE is defined as an entity in which equity investors (i) do not have the characteristics of a controlling financial interest, and/or (ii) do not have sufficient equity at risk for the entity to finance its activities without additional financial support from other parties. Three CDO subsidiaries, which qualify as VIEs, of which the company is the primary beneficiary. Distributions Distributions [Table] Disclosure of information pertaining to distributions of cash dividends declared. Document Period End Date Distributions Distributions Disclosure [Line Items] Maximum Percentage of Taxable Income Payable as Annual Dividends Maximum percentage of taxable income payable as annual dividends to common shareholders under junior subordinated note agreements Represents the maximum percentage of taxable income payable as annual dividends to common shareholders under junior subordinated note agreements. Available-for-sale Securities [Member] Available-for-sale Securities Available-for-sale securities Maximum permissible percentage of taxable income payable as annual dividends to common shareholders in the form of company's stock Maximum Percentage of Taxable Income Payable as Annual Dividends in Form of Company's Stock Represented the maximum permissible percentage of taxable income payable as annual dividends to common shareholders in form of the company's stock under the terms of the junior subordinated note agreement. Percentage of taxable income payable as annual dividends to common shareholders in cash upon expiration Represents the maximum percentage of taxable income payable as annual dividends to common shareholders in cash on expiration of the terms of the junior subordinated note agreement. Percentage of Maximum Permissible Annual Cash Dividends Payable on Expiration Represents the minimum percentage of adjusted taxable income required to be distributed to shareholders for qualifying as a real estate investment trust. Minimum Percentage of Taxable Income to be Distributed as Dividend to Maintain Qualification as REIT Minimum taxable income to be distributed to stockholders to qualify as a REIT (as a percent) Distributions Disclosure [Text Block] Distributions Represents the entire disclosure in relation to dividends payable to common shareholders. Management Agreement Management Agreement Disclosure [Text Block] Management Agreement Represents the entire disclosure in relation to management agreement to provide us with certain services. We pay a base management fee and under certain circumstances an annual incentive fee. NEW YORK New York Due to Borrowers Entity [Domain] Due to Borrowers Due to Borrowers Disclosure [Text Block] Due to borrowers represents borrowers' funds held by the company to fund certain expenditures or to be released at the company's discretion upon the occurrence of certain pre-specified events, and to serve as an additional collateral for borrowers' loans. While retained, these balances earn interest in accordance with the specific loan terms they are associated with. Document and Entity Information Incentive Compensation to Manager Related Party The aggregate amount of noncash, equity-based compensation given as incentive to the manager, also considered a related party, during the reporting period. Incentive compensation to manager-related party Acquisition of tangible asset through restructure of loan Acquisition of Tangible Assets Through Restructure of Loan Represents the value of tangible assets acquired through the restructure of loans in noncash investing or financing transactions. Repayment of Due from Related Party through Reduction of Due to Related Party Reduction in value of due to related party used to settle the amount due from related party in noncash investing or financing transactions. Repayment of due from related party through reduction of due to related party Shelf Registration Statement Shares Available Amount Shares available under the shelf registration Represents the amount of shares for which the entity filed shelf registration statement on Form S-3 with the Securities and Exchange Commission under the Securities Act of 1933, as amended (the 1933 Act) that are currently available under shelf registration. Number of shares of common stock remain available under shelf registration Value of margin calls applied to repurchase agreements in noncash investing or financing transactions. Margin calls applied to repurchase agreements Margin Calls Applied to Repurchase Agreements Termination of Swaps Termination value of swaps in noncash investing or financing transactions. Termination of swaps Gain (loss) included in earnings resulting from the exchange of profits interest. Gain on exchange of profits interest Proceeds from repayment of note payable Gain on exchange of profits interest Gain (Loss) on Exchange of Profits Interest Equity Method Investments Return on Investments Return on investment Represents the return on investment for the noncontrolling interest acquired in the equity method investment. Return on invested capital Equity Method Investment Noncontrolling Interest Acquired Noncontolling interest in equity method investment acquired (as a percent) Represents the percentage of noncontrolling interest in the equity method investment acquired by the entity. Loan origination Noncash Loan Origination The value of non-cash loan origination. Loss on sale and restructuring of loans Losses (Gains) on Sale and Restructuring of Loans For a lender, the aggregate loss (gain) recognized on the sale or restructuring of loans arises from the difference between the carrying value of the loan before the sale or restructuring and the sales price or fair value of the loan, net of payments received, after restructuring is complete. This element refers to the loss (gain) included in earnings and not to the cash proceeds of the sale or restructuring. Acquisition of treasury stock (in shares) Represents the number of common stock shares that were acquired during the period. Treasury Stock Shares Acquisition Shelf Registration Statement, Amount Aggregate amount of securities for which the entity filed shelf registration statement Represents the amount of securities for which the entity filed shelf registration statement on Form S-3 with the Securities and Exchange Commission under the Securities Act of 1933, as amended (the 1933 Act). Class of Warrant Exercisable Immediately [Member] Warrants exercisable immediately Represents the class of warrants which are exercisable immediately. Class of Warrant Exercisable after 2010 July, 23 [Member] Warrants exercisable after July 23, 2010 Represents the class of warrants which are exercisable after July 23, 2010. Class of Warrant Exercisable after 2011 July, 23 [Member] Warrants exercisable after July 23, 2011 Represents the class of warrants which are exercisable after July 23, 2011. All States and Provinces [Domain] Class of Warrant or Right, Number of Warrants Issued Number of warrants issued (in shares) Represents the number of warrants issued by the entity. Class of Warrant or Right Warrants Issued Value Value of warrants using Black-Scholes method Represents the value of the warrants issued during the reporting period, using the Black-Scholes method. Schedule of Business Description and Form of Ownership [Table] Schedule of information related to description of business and nature of ownership. Summary of Significant Accounting Policies [Table] Information related to various accounting policies of the entity. Contractual Commitments [Table] Disclosure of contractual commitments of the entity. Arbor Commercial Mortgage LLC [Member] ACM Represents the information pertaining to Arbor Commercial Mortgage, LLC (ACM). Business Description and Form of Ownership [Line Items] Description of Business / Form of Ownership Arbor Realty Limited Partnership [Member] ARLP Represents the information pertaining to Arbor Realty Limited Partnership (ARLP). Operating Partnership Structured Finance Assets Contribution Amount for Equal Equity Ownership Structured finance assets contribution amount for commensurate equity ownership under operating partnership Represents the amount of structured finance assets contributed for equal equity ownership under operating partnership. Operating Partnership Borrowings Contribution Amount for Equal Equity Ownership Borrowings supported by equity contributed for commensurate equity ownership under operating partnership Represents the amount of borrowings supported by equity contributed for equal equity ownership under operating partnership. Private Placement Units Issued Private equity offering, units issued (including an overallotment option) Represents the number of units issued under private equity offering. Private Placement Warrant Conversion Raito Number of Common Stock Shares Authorized to Purchase Private equity offering, common stock shares per warrant Represents the number of common stock shares that could be purchased per warrant under private equity offering. Private Placement Convertible Unit Conversion Raito Number of Common Stock Shares Private equity offering, shares issued per unit Represents the number of shares of common stock issued per unit under private equity offering. Private Placement Convertible Unit Conversion Raito Number of Warrants Private equity offering, warrants issued per unit Represents the number of warrants issued per unit under private equity offering. Private Placement Warrants Conversion Price Per Common Share Private equity offering, value per unit Represents the purchase price per share of common stock from exercise of warrants under private equity offering. Gross Proceeds from Issuance of Private Placement and Operating Partnership Investments Equity Contribution Increase in equity capital due to private placement gross proceeds and related party concurrent equity contribution The cash inflow associated with the amount received from entity's raising of capital via private placement and equity contribution made under operating partnership. Private Placement Offering Expenses Private equity offering expenses Represents the amount of private placement offering expenses. Net Proceeds from Issuance of Private Placement and Operating Partnership Investments Equity Contribution Change in stockholders' equity and noncontrolling interest as a result of private placement offering expenses The net cash inflow associated with the amount received from entity's raising of capital via private placement and equity contribution made under operating partnership, net of private equity offering expenses. Operating Partnership Warrants Exercised Units Issued Operating partnership units issued for which warrants were exercised Represents the number of operating partnership units issued for which warrants were exercised. Number of share warrants exercised during the period. Stock Issued During Period Shares Warrants Exercised Common stock shares issued from exercise of warrants Operating Partnership Units Redeemed Value of operating partnership units redeemed Represents the number of operating partnership units redeemed. Operating Partnership Unit Redemption Rate to Shares Common stock shares issued on redemption of operating partnership units Represents the number of common stock shares issued upon redemption of each operating partnership unit. Operating Partnership Unit Denomination for Redemption Into Shares Common stock shares issued on redemption of operating partnership units, denominator Represents the denomination for redemption of operating partnership units into shares. Stock Issued During Period Shares Issued to Underwriters Additional shares issued due to exercise of over-allotment option by underwriters Represents the number of shares issued to underwriters as a result of exercise of over-allotment option. Net Proceeds from Issuance of Stock to Underwriters Proceeds from underwriters following the exercise of a portion of their over-allotment option, net Represents the proceeds from exercise of over-allotment option by underwrites, net of the underwriting discount. Secured Debt Repurchase Agreements and Warehouse Agreement Borrowings [Member] Repurchase agreements and credit facilities Carrying value, as of the balance sheet date, of securities sold under agreements to repurchase and the carrying value, as of the balance sheet date, of the outstanding borrowings under warehouse and revolving lines of credit used by mortgage bankers to finance the origination or purchase of loans. Summary of Significant Accounting Policies Collateralized Debt Obligations One [Member] CDO I debt Represents the information pertaining to securities collateralized by a pool of assets and whose reinvestment period is through April 2009, stated maturity date of February 2040, interest is variable based on three-month LIBOR. CDO I - Issued four investment grade tranches January 19, 2005. Reinvestment period through April 2009. Stated maturity date of February 2040. Interest is variable based on three-month LIBOR; the weighted average note rate was 3.94% and 4.49% at September 30, 2012 and December 31, 2011, respectively CDO I Represents the information pertaining to loans represented by an agreement between the entity and another party for repurchase of identical or substantially the same loans at a date certain for a specified price. Loan Repurchase Agreements [Member] Repurchase agreement Entity Well-known Seasoned Issuer Warehousing Credit Facility [Member] Warehousing credit facility Represents the information pertaining to warehousing credit facility expiring in July 2013. Entity Voluntary Filers Loan Repurchase Agreements One [Member] Repurchase agreement, one Represents the information pertaining to loans represented by the first agreement between the entity and another party for repurchase of identical or substantially the same loans at a date certain for a specified price. Entity Current Reporting Status Loan Repurchase Agreements Two [Member] Repurchase agreement, two Represents the information pertaining to loans represented by the second agreement between the entity and another party for repurchase of identical or substantially the same loans at a date certain for a specified price. Entity Filer Category Warehousing Credit Facility Due July 2013 [Member] Warehousing credit facility due July 2013 Represents the information pertaining to warehousing credit facility expiring in July 2013. Entity Public Float Warehousing Credit Facility Due December 2013 [Member] Warehousing credit facility due December 2013 Represents the information pertaining to warehousing credit facility expiring in December 2013. Entity Registrant Name CDO II Collateralized Debt Obligations Two [Member] CDO II debt Represents the information pertaining to securities collateralized by a pool of assets and whose reinvestment period is through April 2011, stated maturity date of April 2038, interest is variable based on three-month LIBOR. CDO II - Issued nine investment grade tranches January 11, 2006. Reinvestment period through April 2011. Stated maturity date of April 2038. Interest is variable based on three-month LIBOR; the weighted average note rate was 3.19% and 2.83% at September 30, 2012 and December 31, 2011, respectively Entity Central Index Key Collateralized Debt Obligations Three [Member] CDO III debt Represents the information pertaining to securities collateralized by a pool of assets and whose reinvestment period is through January 2012, stated maturity date of January 2042, interest is variable based on three-month LIBOR. CDO III - Issued ten investment grade tranches December 14, 2006. Reinvestment period through January 2012. Stated maturity date of January 2042. Interest is variable based on three-month LIBOR; the weighted average note rate was 0.68% and 1.24% at September 30, 2012 and December 31, 2011, respectively CDO III Collateralized Debt Obligations Revolving Note [Member] Revolving note class Represents the information pertaining to revolving note class that provides revolving note facility under CDO III. Collateralized Debt Obligations, Revolving Note Facility [Member] Revolving note facility Represents the information pertaining to revolving note facility provided under CDO III. Mortgage notes payable - real estate owned Represents the information pertaining to liability for mortgage notes payable by the reporting entity in connection with the acquisition of real property in which the reporting entity had a loan secured by the real estate property. Mortgage Loans on Real Estate Owned [Member] Entity Common Stock, Shares Outstanding Mortgage Loans on Real Estate Held For Sale [Member] Mortgage note payable - held-for-sale Represents the information pertaining to liability for mortgage notes payable by the reporting entity in connection with the acquisition of real property in which the reporting entity had a loan secured by the real estate property, classified as held-for-sale. Contractual Commitments [Line Items] Contractual Commitments Contractual Obligation Due in Remainder of Fiscal Year 2012 Amount of contractual obligation maturing in the remainder of the fiscal year following the latest fiscal year ended. Amount of contractual obligation maturing after the fourth fiscal year following the latest fiscal year. Contractual Obligation Due after Fourth Year Thereafter Weighted average remaining maturity (in years) Represents the weighted average remaining period when the debt instrument is scheduled to be fully repaid. Debt Instrument Weighted Average Remaining Maturity Period Loans and Investments Unfunded Commitments Unfunded commitments related to loans and investments Represents the amount of outstanding unfunded commitments related to loans and investments that the entity is obligated to fund as the borrowers meet certain requirements. Available Amount to Fund Unfunded Commitments Available amount to fund unfunded commitments Represents the amount of restricted cash balance and CDO III revolver capacity available to fund the portion of the unfunded commitments for loans financed by the entity's CDO vehicles. Lawsuit Filed by Extended Stay Litigation Trust [Member] Lawsuits filed by Extended Stay Litigation Trust (the Trust) Represents the information pertaining to the lawsuits filed by the Extended Stay Litigation Trust (the Trust) formerly the Extended Stay, Inc. and the Homestead Village L.L.C. family of companies (together ESI). Loss Contingency, Number of New Claims Filed in United States Bankruptcy Court Number of lawsuits filed in United States Bankruptcy Court The total number of new claims filed pertaining to a loss contingency in the United states Bankruptcy Court during the period. Loss Contingency, Damages Sought Value Due to Wrongful Receipt Amount alleged to be wrongfully received by holders of Series A1 Preferred Units The value of the award the plaintiff seeks in the legal matter as the plaintiff alleges the amount has been wrongfully received by the holders of the Series A1 Preferred Units. Summary of Significant Accounting Policies Summary of Significant Accounting Policies [Line Items] Variable Interest Entity Primary Beneficiary Number Number of collateralized debt obligations and collateralized loan obligations subsidiaries Represents the number of variable interest entities in which the entity is a primary beneficiary. Number of consolidated CDO and CLO subsidiaries which qualify as VIEs where the reporting entity is primary beneficiary Real Estate Investments Reclassification to Held For Sale Number of real estate investments reclassified from real estate owned to real estate held-for-sale The number of real estate investments reclassified from real estate owned to held-for-sale during the reporting period. Restricted Cash [Abstract] Restricted Cash Real Estate Investment Property Restricted Cash and Cash Equivalents Restricted cash, real estate owned asset The carrying amounts of cash and cash equivalent items of the entity's real estate owned assets which are restricted as to its withdrawal or usage. Impaired Financing Receivable With Related Allowance Number of Loans Number of impaired loans Represents the number of impaired loans for which there is a related allowance for credit losses. Real Estate Owned and Held For Sale [Abstract] Real Estate Owned and Held-For-Sale Document Fiscal Year Focus Purchase Price Allocation Valuation Period Following Real Estate Property Acquisition Period following the date of acquisition in which the entity finalizes the purchase price allocation of the real estate properties acquired Represents the period following the date of acquisition which the entity finalizes the purchase price allocation of the real estate properties acquired. Document Fiscal Period Focus Funded Interest Reserves Number of Loans Number of loans Represents the number of loans with funded interest reserves. Variable Interest Entity, Loan and Investment December, 2003 [Member] Loan and investment with origination date Dec - 03 Represents the loan and investment in a VIE with an origination date of December 2003. Variable Interest Entity, Loan, January, 2006 [Member] Loan with origination date Jan - 06 Represents the loan in a VIE with an origination date of January 2006. Variable Interest Entity, Loan, March, 2006 [Member] Loan with origination date Mar - 06 Represents the loan in a VIE with an origination date of March 2006. Variable Interest Entity, Loan, June, 2006 One [Member] Loan one with origination date Jun - 06 Represents the first loan in a VIE with an origination date of June 2006. Variable Interest Entity, Loan, August, 2006 [Member] Loan with origination date Aug - 06 Represents the loan in a VIE with an origination date of August 2006. Variable Interest Entity, Loan, September, 2006 [Member] Loan with origination date Sep - 06 Represents the loan in a VIE with an origination date of September 2006. Variable Interest Entity, Loan, October, 2006 One [Member] Loan one with origination date Oct - 06 Represents the first loan in a VIE with an origination date of October 2006. Variable Interest Entity, Loan, October, 2006 Two [Member] Loan two with origination date Oct - 06 Represents the second loan in a VIE with an origination date of October 2006. Variable Interest Entity, Loan, May, 2008 [Member] Loan with origination date May - 08 Represents the loan in a VIE with an origination date of May 2008. Variable Interest Entity, Loan, December, 2006 One [Member] Loan one with origination date Dec - 06 Represents the first loan in a VIE with an origination date of December 2006. Legal Entity [Axis] Variable Interest Entity, Loan, January, 2007 [Member] Loan with origination date Jan - 07 Represents the loan in a VIE with an origination date of January 2007. Document Type Variable Interest Entity, Loan, March, 2007 One [Member] Loan one with origination date Mar - 07 Represents the first loan in a VIE with an origination date of March 2007. Variable Interest Entity, Loan, March, 2007 Two [Member] Loan two with origination date Mar - 07 Represents the second loan in a VIE with an origination date of March 2007. Variable Interest Entity, Loan, February, 2007 [Member] Loan with origination date Feb - 07 Represents the loan in a VIE with an origination date of February 2007. Variable Interest Entity, Loan, March, 2007 Three [Member] Loan three with origination date Mar - 07 Represents the third loan in a VIE with an origination date of March 2007. Variable Interest Entity, Loan, March, 2007 Four [Member] Loan four with origination date Mar - 07 Represents the fourth loan in a VIE with an origination date of March 2007. Variable Interest Entity, Loan, June, 2007 [Member] Loan with origination date Jun - 07 Represents the loan in a VIE with an origination date of June 2007. Variable Interest Entity, Loan, July, 2007 One [Member] Loan one with origination date Jul - 07 Represents the first loan in a VIE with an origination date of July 2007. Variable Interest Entity, Loan, July, 2007 Two [Member] Loan two with origination date Jul - 07 Represents the second loan in a VIE with an origination date of July 2007. Variable Interest Entity, Loan, July, 2007 Three [Member] Loan three with origination date Jul - 07 Represents the third loan in a VIE with an origination date of July 2007. Variable Interest Entity, Loan, February, 2008 [Member] Loan with origination date Feb - 08 Represents the loan in a VIE with an origination date of February 2008. Variable Interest Entity, Loan, May, 2006 [Member] Loan with origination date May - 06 Represents the loan in a VIE with an origination date of May 2006. Variable Interest Entity, Loan, August, 2007 [Member] Loan with origination date Aug - 07 Represents the loan in a VIE with an origination date of August 2007. Variable Interest Entity, Loan, December, 2006 Two [Member] Loan two with origination date Dec - 06 Represents the second loan in a VIE with an origination date of December 2006. Variable Interest Entity, Loan, December, 2006 Three [Member] Loan three with origination date Dec - 06 Represents the third loan in a VIE with an origination date of December 2006. Variable Interest Entity, Loan, June, 2006 Two [Member] Loan two with origination date Jun - 06 Represents the second loan in a VIE with an origination date of June 2006. Variable Interest Entity, Loan, August, 2010 [Member] Loan with origination date Aug - 10 Represents the loan in a VIE with an origination date of August 2010. Variable Interest Entity, Loan, December, 2010 [Member] Loan with origination date Dec - 10 Represents the loan in a VIE with an origination date of December 2010. Variable Interest Entity, Loan, January, 2011 [Member] Loan with origination date Jan - 11 Represents the loan in a VIE with an origination date of January 2011. Variable Interest Entity, Loan, April, 2011 [Member] Loan with origination date Apr - 11 Represents the loan in a VIE with an origination date of April 2011. Variable Interest Entity, Loan, February, 2006 [Member] Loan with origination date Feb - 06 Represents the loan in a VIE with an origination date of February 2006. Variable Interest Entity, Loan, November, 2008 [Member] Loan with origination date Nov - 08 Represents the loan in a VIE with an origination date of November 2008. Variable Interest Entity, Loan, November, 2011 One [Member] Loan one with origination date Nov - 11 Represents the first loan in a VIE with an origination date of November 2011. Variable Interest Entity, Loan, November, 2011 Two [Member] Loan two with origination date Nov - 11 Represents the second loan in a VIE with an origination date of November 2011. Variable Interest Entity, Loan and Investment, December, 2011 [Member] Loan and investment with origination date of Dec - 11 Represents the loan and investment in a VIE with an origination date of December 2011. Variable Interest Entity, Investment, May, 2008 [Member] Investment with origination date May-08 Represents the investment in a VIE with an origination date of May 2008. Variable Interest Entity, Investment, December, 2010 [Member] Investment with origination date Dec - 10 Represents the investment in a VIE with an origination date of December 2010. Variable Interest Entity, Investment, July, 2011 One [Member] Investment one with origination date Jul - 11 Represents the first investment in a VIE with an origination date of July 2011. Variable Interest Entity, Investment, July, 2011 Two [Member] Investment two with origination date Jul - 11 Represents the second investment in a VIE with an origination date of July 2011. Variable Interest Entity, Investment, October, 2011 One [Member] Investment one with origination date Oct - 11 Represents the first investment in a VIE with an origination date of October 2011. Variable Interest Entity, Investment, October, 2011 Two [Member] Investment two with origination date Oct - 11 Represents the second investment in a VIE with an origination date of October 2011. Variable Interest Entity, Investment, November, 2011 One [Member] Investment one with origination date Nov - 11 Represents the first investment in a VIE with an origination date of November 2011. Variable Interest Entity, Investment, December, 2011 One [Member] Investment one with origination date Dec - 11 Represents the first investment in a VIE with an origination date of December 2011. Variable Interest Entity, Investment, December, 2011 Two [Member] Investment two with origination date Dec - 11 Represents the second investment in a VIE with an origination date of December 2011. Variable Interest Entity, Investment, November, 2011 Two [Member] Investment two with origination date Nov - 11 Represents the second investment in a VIE with an origination date of November 2011. Variable Interest Entity, Investment, April, 2005 [Member] Investment with origination date Apr - 05 Represents the investment in a VIE with an origination date of April 2005. Variable Interest Entity, Investment, June, 2006 [Member] Investment with origination date Jun - 06 Represents the investment in a VIE with an origination date of June 2006. Variable Interest Entity not Primary Beneficiary Number Number of VIEs where the reporting entity is not VIE's primary beneficiary Represents the number of variable interest entities (VIEs) in which the entity is not a primary beneficiary. Management Agreement [Table] Disclosure of information pertaining to the agreement with other party related to management services provided by them. Management Agreement [Line Items] Management Agreement Management Agreement Estimated Base Management Fee in Current Fiscal Year Expected base management fees during current period Represents the anticipated amount of base management fees that the entity will be reimbursing to the manager during current period. These fees are paid on the basis of arrangement whereby the entity reimburses the other party for its actual costs incurred in managing the entity's business based on the parties' agreement in advance on an annual budget with subsequent quarterly true-ups to actual costs. Management Agreement, Incentive Percent, Fee Incentive fee calculation percentage Represents the percentage of incentive fee charged for operating and managing the entity's business during the reporting period which is based on meeting certain profitability metrics. Management Agreement, Percentage of Loan Loss Reserve Recoveries used in Calculation of Incentive Fee Percentage of loan loss reserve recoveries used in calculation of incentive fee Represents the percentage of loan loss reserve recoveries used in calculation of incentive fee. Management Agreement, Loan Loss Reserve Recoveries Period for Calculation of Incentive, Fee Period during which the loan loss reserve recoveries are to be taken into consideration for calculation of incentive fee Represents the period during which the loan loss reserve recoveries are to be taken into consideration for calculation of incentive fee. Management Agreement, Interest Rate used in Calculation of Incentive Fee Annual interest rate used in computation of incentive fee (as a percent) Represents the annual interest rate used in computation of incentive fee. Management Agreement, Term of US Treasury Rate used in Calculation of Incentive Fee Term of U.S. Treasury Rate used in computation of incentive fee Represents the term of the U.S. Treasury Rate used in computation of incentive fee. Management Agreement, Basis Spread added to US Treasury Rate for Calculation of Incentive Fee Basis spread added to the U.S. Treasury Rate for computation of incentive fee (as a percent) Represents the basis spread added to the U.S. Treasury Rate for computation of incentive fee. Management Agreement Multiplier used in Calculation of Incentive Fee Multiplier used in computation of incentive fee Represents the multiplier used in computation of incentive fee. Management Agreement, Termination Fee Termination fee Represents the amount of termination fee payable on termination of the management agreement. Management Agreement, Renewable Period Renewable period for management agreement Represents the period for which the management agreement is automatically renewable unless terminated. Management Agreement, Termination Notice Period Prior written notice period for termination Represents the period for which notice is required to be served for termination of the management agreement. This notice is required to be served prior to termination. Management Fees, Incentive Payment Period Period after each fiscal quarter in which the incentive fee is payable Represents the period after each fiscal quarter in which the incentive fee is required to be paid. Percentage of Incentive Fee Paid in Common Stock Percentage of incentive fee paid by issuance of common stock shares Represents the percentage of incentive fee paid by way of issuance of common stock shares. Number of Days Average Closing Common Stock Price to be Considered for Incentive Fee Paid in Common Stock Number of days during the end of fiscal quarter with respect to which incentive fee is being paid Represents the number of days during which the average closing price of the entity's common stock is considered in order to issue common stock shares as a part of management incentive fee. Equity investment for commensurate equity ownership under operating partnership Proceeds from Operating Partnership Investments Equity Contribution The cash inflow associated with the amount received from equity contribution made under operating partnership. Flushing 930 and Evergreen 80 [Member] 930 Flushing & 80 Evergreen Represents the investment in 930 Flushing & 80 Evergreen, an equity affiliate of the entity accounted under the equity method of accounting. Fifth 200 Avenue Property [Member] 200 Fifth Avenue property Represents information pertaining to 200 Fifth Avenue property. Broadway 1107 [Member] 1107 Broadway Represents information pertaining to 1107 Broadway. West 450 Street 33 [Member] 450 West 33rd Street Represents the investment in 450 West 33rd Street, an equity affiliate of the entity accounted under the cost method of accounting. St Johns Development [Member] St. John's Development Represents the investment in St. John's Development, an equity affiliate of the entity accounted under the equity method of accounting. Lightstone Value Plus REIT LP [Member] Lightstone Value Plus REIT L.P Represents the investment in Lightstone Value Plus REIT L.P, an equity affiliate of the entity accounted under the cost method of accounting. JT Prime [Member] JT Prime Represents the investment in JT Prime, an equity affiliate of the entity accounted under the equity method of accounting. West Shore Cafe [Member] West Shore Cafe Represents the investment in West Shore Cafe, an equity affiliate of the entity accounted under the equity method of accounting. Ritz Carlton Club [Member] Ritz-Carlton Club Represents the investment in Ritz-Carlton Club, an equity affiliate of the entity accounted under the equity method of accounting. Lexford Portfolio Represents the investment in Lexford Portfolio, an equity affiliate of the entity accounted under the equity method of accounting. Lexford Lexford Portfolio [Member] Issuersof Junior Subordinated Notes [Member] Issuers of Junior Subordinated Notes Represents the investment in the issuers of the Junior Subordinated Notes, an equity affiliate of the entity accounted under the equity method of accounting. Preferred Equity Investments in Mortgage Loans [Member] Preferred equity investments Represents the entity's preferred equity investments in mortgage loans on real estate. Original Preferred Equity Investments in Mortgage Loans [Member] Original preferred equity investment Represents the entity's original preferred equity investments in mortgage loans on real estate. New Preferred Equity Investments in Mortgage Loans [Member] New preferred equity investment Represents the entity's new preferred equity investments in mortgage loans on real estate. Affiliate of Mr Ivan Kaufman [Member] Affiliate of Mr. Ivan Kaufman Represents information pertaining to an affiliate of Mr. Ivan Kaufman. Affiliated entity of Mr. Ivan Kaufman Ivan Kaufman and His Affiliated Entity [Member] Kaufman Entities Represents the information pertaining to Mr. Ivan Kaufman, chairman, chief executive officer and president and the affiliated entity of Mr. Ivan Kaufman. Mortgage Loans on Real Estate, Restructured Loan restructured The amount of mortgage loans on real estate which were restructured during the reporting period. Mortgage Loans on Real Estate, Additional Investment by Entity and Independent Outside Investors Additional investment made by the company along with a consortium of independent outside investors The amount of additional investment made by the company, along with a consortium of independent outside investors, in the mortgage loans on real estate during the reporting period. Mortgage Loans on Real Estate, Additional Investment The entity's interest of the additional investment made in the mortgage loans on real estate during the reporting period. Interest held in the additional investment made Mortgage Loans on Real Estate, Description of Original Variable Rate, Basis Original variable rate basis The reference rate for the original variable rate on the mortgage loan receivable, such as LIBOR or the U.S. Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. Mortgage Loans on Real Estate, Original Basis Spread on Variable Rate Original basis spread (as a percent) The percentage points added to the reference rate to compute the original variable rate on the mortgage loan receivable. Equity Method Investments Ownership Percentage Sold Economic interest sold (as a percent) The percentage of ownership sold of common stock or equity participation in the investee accounted for under the equity method of accounting. Equity Method Investment Return on Investments Percentage Return on investment (as a percent) Represents the percentage return on investment for the noncontrolling interest acquired in the equity method investment. The reference rate for the modified variable rate on the mortgage loan receivable, such as LIBOR or the U.S. Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. Mortgage Loans on Real Estate, Description of Modified Variable Rate, Basis Modified variable rate basis Mortgage Loans on Real Estate, Modified Basis Spread on Variable Rate Modified basis spread (as a percent) The percentage points added to the reference rate to compute the modified variable rate on the mortgage loan receivable. Mortgage Loans on Real Estate Fixed Interest Rate Fixed rate of interest (as a percent) Represents the fixed interest rate on the mortgage loan receivable or the weighted average interest rate on a group of loans. The cash outflow associated with the purchase of or advances to equity method investments by the company, along with a consortium of independent outside investors. Payments to Acquire Equity Method Investments by Entity and Independent Outside Investors Equity investment made Property Management Contract Period Contract period with the new entity Represents the period of the property management contract. Property Management Fees as Percentage of Gross Revenues of Underlying Properties Fees as a percentage of gross revenues of the underlying properties Represents the fees payable as a percentage of gross revenues of the underlying properties under the property management contract. Management Fee Amount, Outstanding Base management fee expenses due to related party Carrying amount as of the balance sheet date of obligations due all related parties for base management fee expenses. Fiduciary Duty Claims [Member] Fiduciary Duty Claims Represents information pertaining to the Fiduciary Duty Claims which are claims related to aided and abetted, induced or participated in breaches of fiduciary duty, waste and unjust enrichment. Arbor ESH II LLC [Member] Arbor ESH II, LLC Represents the information pertaining to Arbor ESH II, LLC. Number of defendants who are corporate and partnership entities Number of defendants named in a legal action who are corporate and partnership entities. Loss Contingency, Number of Defendants who are Corporate and Partnership Entities Loss Contingency, Number of Defendants who are Individuals Number of defendants named in a legal action who are individuals Number of defendants named in a legal action who are individuals. Investment in Holding Company of Debtors Investments in the Series A1 Preferred Units of a holding company of Extended Stay, Inc. Represents the information pertaining to the investment in the Series A1 preferred units of a holding company of Extended Stay, Inc. Real Estate, Held For Sale Probable Period for Completion of Sale Period in within the probable sale will be completed for real estate to be classified as held-for-sale Represents the period of time in which the probability of a sale will be completed for real estate to be classified as held-for-sale. Schedule of Base Management Fees and Incentive Fees [Table Text Block] Tabular disclosure of the base management fees and incentive fees paid as per the terms of agreement with management. Schedule of company's base management fees and incentive fees Derivative Number of Instruments for which Notional Amount Decreased Number of derivative instruments, the notional amount of which decreased Represents the number of derivative instruments, the notional amount of which decreased. Derivative Notional Amount Increase (Decrease) Decrease in notional value Represents the increase (decrease) in the notional value of derivative instruments. Derivative Number of Instruments Matured Number of interest rate swaps matured The number of derivative instruments matured during the period. Notional Amount of Derivatives Matured Notional value of matured instruments Represents the notional value of derivative instruments that have matured during the reporting period. Terminated Hedges [Member] Terminated hedges Derivative instruments designated as hedging instruments which have been terminated. Basis Swaps and Caps [Member] Basis Swaps / Caps Represents the interest rate swap contracts where both rates are variable but are tied to different index rates and contracts in which the cap writer, in return for a premium, agrees to limit or cap the cap holder's risk associated with an increase in interest rates. Interest Rate Swaps and Caps [Member] Interest Rate Swaps / Caps Represents the forward based contracts in which two parties agree to swap periodic payments that are fixed at the outset of the swap contract with variable payments based on a market interest rate (index rate) over a specified period and contracts in which the cap writer, in return for a premium, agrees to limit or cap the cap holder's risk associated with an increase in interest rates. Interest Rate, Swaps, Caps and Forward Contracts [Member] Interest Rate Swaps / Caps / Forward Contracts Represents the forward based contracts in which two parties agree to swap periodic payments that are fixed at the outset of the swap contract with variable payments based on a market interest rate (index rate) over a specified period and contracts in which the cap writer, in return for a premium, agrees to limit or cap the cap holder's risk associated with an increase in interest rates or contracts negotiated between two parties to purchase and sell a specific quantity of a financial instrument, foreign currency, or commodity at a price specified at origination of the contract, with delivery and settlement at a specified future date. Accumulated Other Comprehensive Income (Loss) Net, Deferred Hedge Gains (Losses) Net of Tax Net deferred loss in accumulated other comprehensive loss After tax net amount of deferred hedged gains (losses) on terminated swaps that are recognized as increases (decreases) in other comprehensive income. Accretion of Deferred Hedge Gains Reduction to interest expense related to the accretion of the net gains Represents the reduction to interest expense related to the accretion of the net gains. Derivative Instruments Deferred Gain (Loss) to be Reclassified During Next 12 Months Net Amount of net deferred loss expected to be recorded to interest expense over the next twelve months The estimated net amount of deferred gains (losses) on terminated hedges, as of the reporting date, expected to be reclassified to earnings within the next 12 months. Accumulated Other Comprehensive Income (Loss) Cumulative Changes in Fair Value of Cash Flow Hedges, Net of Tax Cumulative amount of other comprehensive loss related to net unrealized losses on derivatives designated as cash flow hedges attributable to fair value of qualifying cash flow hedges Accumulated change in accumulated gains and losses related to the change in fair value of derivative instruments designated and qualifying as the effective portion of cash flow hedges, net of tax. Accumulated Other Comprehensive Income (Loss) Deferred Hedge Losses, Net of Tax Cumulative amount of other comprehensive loss related to net unrealized losses on derivatives designated as cash flow hedges attributable to deferred losses terminated interest swaps After tax net amount of deferred hedged losses on terminated swaps that are recognized as increases (decreases) in other comprehensive income. Accumulated Other Comprehensive Income (Loss) Deferred Hedge Gains, Net of Tax Cumulative amount of other comprehensive loss related to net unrealized losses on derivatives designated as cash flow hedges attributable to deferred gains on terminated interest swaps After tax net amount of deferred hedged gains on terminated swaps that are recognized as increases (decreases) in other comprehensive income. Available For Sale Securities Credit Quality Indicators [Table Text Block] Tabular disclosure of available-for-sale securities by credit quality indicator. The credit quality indicator is a statistic about the credit quality of available-for-sale securities. Examples include, but are not limited to, consumer credit risk scores, credit-rating-agency ratings, the entity's internal credit risk grades and other internal metrics. Summary of the underlying credit rating of the company's CDO bond and CMBS investments available-for-sale Summary of the underlying credit ratings of the company's RMBS and CMBS investments held-to-maturity Tabular disclosure of held-to-maturity securities by credit quality indicator. The credit quality indicator is a statistic about the credit quality of held-to-maturity securities. Examples include, but are not limited to, consumer credit risk scores, credit-rating-agency ratings, the entity's internal credit risk grades and other internal metrics. Held To Maturity Securities Credit Quality Indicators [Table Text Block] Realty Finance Corporation Represents information pertaining to Realty Finance Corporation, formerly CBRE Realty Finance, Inc. Realty Finance Corporation [Member] Mezzanine loan Mezzanine Loan [Member] Mezzanine loans Represents the information pertaining to mezzanine loans issued by the entity. UNITED STATES United States Available For Sale Securities, Face Value Face Value Represents the face value of available-for-sale securities that serve as collateral. Collateral Securities, Face Value Available For Sale Securities, Amortization of Premium Amortization of Premium Accumulated amortization of premium of available-for-sale securities at the end of the reporting period. Available For Sale Securities, Number Number of securities Represents the number of available-for-sale securities held by the entity. Available For Sale Securities, Percentage Percent of Total Represents the available-for-sale securities expressed as a percentage. Base rate The reference rate for the variable rate of the investment securities, such as LIBOR or the U.S. Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. Investment Description of Variable Rate Basis Interest spread (as a percent) The percentage points added to the reference rate to compute the variable rate on the investment securities. Investment Basis Spread on Variable Rate Stated maturity period (in years) Represents the maturity period of the investment securities. Investment Maturity Period Estimated remaining life (in years) Represents the estimated remaining maturity period of the investment securities. Investment Estimated Remaining Maturity Period Represents the discount amount at the time of purchase of debt security categorized as neither trading nor held-to-maturity. Investment Unamortized Discount Original discount Available For Sale Securities, Continuous Unrealized Loss Position Period Period for which an available-for-sale security have been in a loss position as compared to its original purchase price (in months) Represents the period for which an available-for-sale security has been in a loss position as compared to its original purchase price. Residential Mortgage Backed Securities Purchased at Par One [Member] RMBS investment purchased at par, one Represents information pertaining to the first security collateralized by residential real estate mortgage loans purchased at par. Residential Mortgage Backed Securities Purchased at Par Two [Member] RMBS investment purchased at par, two Represents information pertaining to the second security collateralized by residential real estate mortgage loans purchased at par. Residential Mortgage Backed Securities Purchased at Par Three [Member] RMBS investment purchased at par, three Represents information pertaining to the third security collateralized by residential real estate mortgage loans purchased at par. Residential Mortgage Backed Securities Purchased at Par Four [Member] RMBS investment purchased at par, four Represents information pertaining to the fourth security collateralized by residential real estate mortgage loans purchased at par. Residential Mortgage Backed Securities Purchased at Premium One [Member] RMBS investment purchased at premium, one Represents information pertaining to the first security collateralized by residential real estate mortgage loans purchased at premium. Residential Mortgage Backed Securities Purchased at Premium Two [Member] RMBS investment purchased at premium, two Represents information pertaining to the second security collateralized by residential real estate mortgage loans purchased at premium. Residential Mortgage Backed Securities Purchased at Premium Three [Member] RMBS investment purchased at premium, three Represents information pertaining to the third security collateralized by residential real estate mortgage loans purchased at premium. Residential Mortgage Backed Securities Purchased at Discount [Member] RMBS investment purchased at discount Represents information pertaining to the security collateralized by residential real estate mortgage loans purchased at discount. Residential Mortgage Backed Securities Purchased at Par [Member] RMBS investment purchased at par Represents information pertaining to the security collateralized by residential real estate mortgage loans purchased at par. Residential Mortgage Backed Securities Purchased at Premium [Member] RMBS investment purchased at premium Represents information pertaining to the security collateralized by residential real estate mortgage loans purchased at premium. NR No rating has been requested, or there is insufficient information on which to base a rating by the external credit rating agency, Standard & Poor's. Standard Poors Unrated [Member] Held To Maturity Securities, Face Value Face Value Represents the face value of investments categorized as held-to-maturity. Held To Maturity Securities, Unrecognized Holding Gain (Loss) Unrealized Gain / (Loss) The excess of fair value over carrying value (amortized cost) of a debt security categorized as held-to-maturity or excess of carrying value (amortized cost) over fair value, exclusive of dividend or interest income recognized but not yet received and exclusive of any write-downs for other-than-temporary impairment, as of the balance sheet date. Such item represents the gross unrecognized holding gains (losses). Held To Maturity Securities, Number Number of securities Represents the number of securities owned by the entity categorized as held-for-sale. Number of investments financed with a repurchase agreement with a financial institution Represents the held-to-maturity securities expressed as a percentage. Held To Maturity Securities, Percentage Percent of Total Held To Maturity Securities, Purchased at Par Number Number of investments purchased at par Represents the number of held-to-maturity securities purchased at par. Held To Maturity Securities, Purchased at Premium Number Number of investments purchased at premium Represents the number of held-to-maturity securities purchased at premium. Held To Maturity Securities, Debt Maturities Year Two Net Carrying Amount Securities maturing in 2014 Carrying amount of debt securities accounted for as held-to-maturity, net of adjustments including, but not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized and fair value hedge accounting adjustments, maturing in the second fiscal year following the latest fiscal year. Held To Maturity Securities, Debt Maturities Year Three Net Carrying Amount Securities maturing in 2015 Carrying amount of debt securities accounted for as held-to-maturity, net of adjustments including, but not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized and fair value hedge accounting adjustments, maturing in the third fiscal year following the latest fiscal year. Held To Maturity Securities, Financed with Repurchase Agreement with Financial Institution Amount Represents the amount provided by the financial institution to the entity on purchase of investment securities categorized as held-to-maturity. Purchase amount of securities financed by financial institution Investments financed with a repurchase agreement with a financial institution Amount of repurchase agreement for financing the purchase of investments Represents the percentage of investments in securities categorized as held-to-maturity that is financed by the financial institution. Percentage of finance to individual investment Financial Institution Refinance Amount Percentage to Held To Maturity Securities Investments Percentage of finance to individual investment by financial institution Investment Weighted Average Yield Weighted average yield (as a percent) Represents the weighted average yield on investment securities bases on their face values, including the amortization of premium. Carrying amount of debt securities accounted for as held-to-maturity, net of adjustments including, but not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized, and fair value hedge accounting adjustments, maturing in the remainder of the fiscal year following the latest fiscal year ended. Securities maturing in 2012 Held To Maturity Securities Debt Maturities Remainder of Fiscal Year Carrying Amount Represents the information pertaining to notes payable related to investment in equity affiliates and junior loans in which the entity has interest. Notes Payable [Member] Notes payable Schedule of Debt Instrument, Covenant Compliance [Table Text Block] Summary of the company's CDO compliance tests as of the most recent determination date Tabular disclosure of information pertaining to debt instruments' compliance tests for determination whether the entity was in compliance with all financial covenants and restrictions. Net Worth Covenant Compliance Net worth required under covenant Represents the net worth required to be maintained under covenant related to credit facility. Restricted Investments Financed in Facility Number Number of investments financed in the facility Represents the number of investments financed in the facility. Debt Instrument, Maturity Period Maturity period (in years) Represents the maturity period of the borrowings of the entity. Debt Instrument, Period of Advance Repayment in Case of Number of Days Past Due Period by which loans become past due requiring full payment of an advance (in days) Represents the period by which loans become past due requiring full payment of an advance. Liquidity Covenant Compliance Liquidity requirement Represents the liquidity amount required according to covenants related to credit facility. Tangible Net Worth, Covenant Compliance Tangible net worth including junior subordinated notes as equity Represents the tangible net worth including junior subordinated notes as equity required according to covenants related to credit facility. Total Liabilities Less Subordinated Debt, Covenant Compliance Total liabilities less subordinated debt Represents the total liabilities less subordinated debt required according to covenants related to credit facility. Compensating Balance by Entity and Affiliates, Covenant Compliance Required compensating balance to be maintained by the entity and its affiliates Represents the compensating balance required to be maintained according to covenants related to credit facility. Debt Instrument, Maturity Date, Length of Extension Period Extension of maturity date (in years) Length of the extension period of the warehouse facility, which may be presented in years. Debt Instrument, Number of Paydowns Number of paydowns The number of times the paydown is required to be made under the borrowing facility. Debt Instrument, Paydowns Percentage Paydowns (as a percent) Represents the paydowns required to be made under the borrowing facility, expressed as a percentage. Debt Instrument, Advance Rate Advance rate (as a percent) Represents the advance rate related to debt instruments. Debt Instrument Increased Advance Rate Under Specific Conditions and Several Restrictions Increase advance rate under specified conditions and several restrictions Represents the increased advance rate related to debt instruments under specified conditions and several restrictions. Mortgage Loans on Real Estate Principal Amount of Mortgages Collateral Loans, Unpaid Principal Represents the unpaid principal balance of the mortgage loans that serve as collateral. Collateralized Loan Obligation, Collateral at Risk Collateral-At-Risk Represents the face value of collateral in default, as defined by the CDO indenture, as well as assets deemed to be a credit risk. Credit risk assets are reported by each of the CDOs and are generally defined as the one that, in the CDO collateral manager's reasonable business judgment, has a significant risk of declining in credit quality or, with a passage of time, becoming a defaulted asset. Debt Instrument Investment Grade Tranches, Issued, Number Number of investment grade tranches issued Represents the number of investment grade tranches issued by the entity under collateralized debt obligations. Debt, Weighted Average Interest Rate, Excluding Swap Effect Weighted average note rate excluding the swap effect (as a percent) Reflects the calculation, as of the balance sheet date, of the average interest rate excluding the effect of swap weighted by the amount of debt outstanding by type or by instrument at that time. Debt Instrument, Periodic Principal Payments, No Longer Made after Replenishment Date Amount of the periodic principal payments that will no longer be made as of the replenishment date. Unpaid amortization payments made on replenishment date Represents the information pertaining to investment grade rated class C and F notes issued by the CDO III issuing entity. Collateralized Debt Obligations, Three Class C and Class F Notes [Member] Class C and F notes Collateralized Debt Obligations Class C D E F G and H Notes [Member] Class C, D, E, F, G and H Represents the information pertaining to investment grade rated class C, D, E, F, G and H notes issued by the CDO issuing entity. Collateralized Debt Obligations Class B and E Notes [Member] Class B and E Represents the information pertaining to investment grade rated class B and E notes issued by the CDO issuing entity. Collateralized Debt Obligations Class H Notes [Member] Class H Represents the information pertaining to investment grade rated class H notes issued by the CDO issuing entity. Collateralized Debt Obligations, Three Class F Notes [Member] Class F Represents the information pertaining to investment grade rated class F notes issued by the CDO III issuing entity. Collateralized Debt Obligations, Three Class C Notes [Member] Class C Represents the information pertaining to investment grade rated class C notes issued by the CDO III issuing entity. Represents the information pertaining to investment grade rated class A2 notes issued by the CDO issuing entity. Collateralized Debt Obligations, Class A2 Notes [Member] Class A2 Collateralized Debt Obligations Three Class B C D and Class F Notes [Member] Class B, C, D and F notes Represents the information pertaining to investment grade rated class B,C, D, and F notes issued by the CDO issuing entity. Collateralized Debt Obligations, Class B Notes [Member] Class B Represents the information pertaining to investment grade rated class B notes issued by the CDO issuing entity. Collateralized Debt Obligations Class D and E Notes [Member] Class D and E Represents the information pertaining to investment grade rated class D and E notes issued by the CDO issuing entity. Collateralized Debt Obligations, Class D Notes [Member] Class D Represents the information pertaining to investment grade rated class D notes issued by the CDO issuing entity. Collateralized Debt Obligations, Class E Notes [Member] Class E Represents the information pertaining to investment grade rated class E notes issued by the CDO issuing entity. Collateralized Debt Obligations, Class G Notes [Member] Class G Represents the information pertaining to investment grade rated class G notes issued by the CDO issuing entity. Unsecured Junior Subordinated Notes, due March 2034 One [Member] Junior subordinated notes, maturity March 2034, unsecured, face amount of $28.0 million, interest rate fixed until 2012 then variable based on three-month LIBOR, the weighted average note rate was 3.32% and 0.50%, respectively Represents the first unsecured junior subordinated notes with maturity date of March 2034. Unsecured Junior Subordinated Notes, due April 2035 One [Member] Junior subordinated notes, maturity April 2035, unsecured, face amount of $7.0 million, interest rate fixed until 2012 then variable based on three-month LIBOR, the weighted average note rate was 3.65% and 0.50%, respectively Represents the first unsecured junior subordinated notes with maturity date of April 2035. Unsecured Junior Subordinated Notes, due March 2034 Two [Member] Junior subordinated notes, maturity March 2034, unsecured, face amount of $28.0 million, interest rate fixed until 2012 then variable based on three-month LIBOR, the weighted average note rate was 3.32% and 0.50%, respectively Represents the second unsecured junior subordinated notes with maturity date of April 2035. Unsecured Junior Subordinated Notes, due March 2034 Three [Member] Junior subordinated notes, maturity March 2034, unsecured, face amount of $27.3 million, interest rate fixed until 2012 then variable based on three-month LIBOR, the weighted average note rate was 3.32% and 0.50%, respectively Represents the third unsecured junior subordinated notes with maturity date of April 2035. Unsecured Junior Subordinated Notes, due June 2036 One [Member] Junior subordinated notes, maturity June 2036, unsecured, face amount of $14.6 million, interest rate fixed until 2012 then variable based on three-month LIBOR, the weighted average note rate was 2.98% and 0.50%, respectively Represents the first unsecured junior subordinated notes with maturity date of June 2036. Unsecured Junior Subordinated Notes, April 2037 One [Member] Junior subordinated notes, maturity April 2037, unsecured, face amount of $15.7 million, interest rate fixed until 2012 then variable based on three-month LIBOR, the weighted average note rate was 2.88% and 0.50%, respectively Represents the first unsecured junior subordinated notes with maturity date of April 2037. Unsecured Junior Subordinated Notes, Due April 2037 Two [Member] Junior subordinated notes, maturity April 2037, unsecured, face amount of $31.5 million, interest rate fixed until 2012 then variable based on three-month LIBOR, the weighted average note rate was 2.88% and 0.50%, respectively Represents the second unsecured junior subordinated notes with maturity date of April 2037. Unsecured Junior Subordinated Notes, Due April 2035 Two [Member] Junior subordinated notes, maturity April 2035, unsecured, face amount of $21.2 million, interest rate fixed until 2012 then variable based on three-month LIBOR, the weighted average note rate was 3.65% and 0.50%, respectively Represents the second unsecured junior subordinated notes with maturity date of April 2035. Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Other Comprehensive Loss Unsecured Junior Subordinated Notes, Due June 2036 Two [Member] Junior subordinated notes, maturity June 2036, unsecured, face amount of $2.6 million, interest rate fixed until 2012 then variable based on three-month LIBOR, the weighted average note rate was 2.98% and 0.50%, respectively Represents the second unsecured junior subordinated notes with maturity date of June 2036. Former Trust Preferred Securities [Member] Retired outstanding trust preferred securities Represents the information pertaining to former trust preferred securities issued by the entity consisting of junior subordinated notes and common stock issued. Debt Instrument, Issuance as Percentage of Face Value Percentage of original face amount at which debt was issued Represents the amount of debt issued as a percentage of its face value. Debt Instrument, Permissible Percentage of Taxable Income Distributable to Common Stockholders under Modification Period Permissible percentage of taxable income distributable to common stockholders under modification period Represents the permissible percentage of taxable income distributable to common stockholders under debt instrument modification period. Debt Instrument, Original Maturity Period Original maturity period (in years) Represents the maturity period of the borrowings of the entity. Debt Instrument, Issue Date Non Redemption Period Nonredeemable period from issue date (in years) Represents the period from issuance during which debt instrument was not redeemable. Percentage above face value at which debt was issued Represents the difference between face value and amount at which debt was issued, expressed as a percentage. Debt Instrument, Issuance as Percentage of Face Value Difference Debt Instrument, Amount due at Maturity Amount of the principal payments due at maturity, which is being amortized into expense over the life of the debt. Deferred amount due at maturity Deferred amount Notes Payable, Expiring July 2016 [Member] Note payable relating to investment in equity affiliates, $50.2 million, expiration July 2016, interest is fixed, the weighted average note rate was 4.06% Represents the information pertaining to notes payable related to investment in equity affiliates, expiring in July 2016. Secured Junior Participating Loans, Expiring July 2012 [Member] Junior loan participation secured by the Company's interest in a mezzanine loan with a principal balance of $32.0 million, participation interest was based on a portion of the interest received from the loan which had a variable rate of LIBOR plus 4.35% Represents the information pertaining to secured junior participating loans, expiring in July 2012. Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax Net unrealized losses on derivatives designated as qualifying hedging instruments Cumulative amount of other comprehensive loss related to net unrealized losses on derivatives designated as qualifying hedges Secured Junior Participating Loans, Expiring August 2012, [Member] Junior loan participation, maturity of August 2012, secured by the Company's interest in a mezzanine loan with a principal balance of $11.8 million. The participation had a 0% rate of interest Represents the information pertaining to secured junior participating loans, expiring in August 2012. Secured Junior Participating Loans [Member] Junior loan participation, secured by the Company's interest in a first mortgage loan with a principal balance of $1.3 million, participation interest was based on a portion of the interest received from the loan which has a fixed rate of 9.57% Represents the information pertaining to junior participating loans secured by first mortgage loan. Notes Payable, Senior Participation, Face Amount Senior participation face value The stated principal amount of the senior participation portion of notes payable at time of issuance, which may vary from the carrying amount because of unamortized premium or discount. Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Other Comprehensive Income / (Loss) Mortgage Notes Payable, Secured by Real Estate Owned Due March, 2014 [Member] Mortgage Notes Payable - Real Estate Owned with maturity date of March 2014 Represents the information pertaining to mortgage notes payable with maturity date of March 2014 secured by real estate owned by the entity. Mortgage Notes Payable, Secured by Real Estate Held For Sale Due December, 2013 [Member] Mortgage Note Payable - Held-For-Sale with maturity date of December 2013 Represents the information pertaining to mortgage notes payable with maturity date of December 2013 secured by real estate held-for-sale by the entity. Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Unrealized gain related to available-for-sale securities Mortgage Notes Payable, Secured by Real Estate Held For Sale Due June, 2012 [Member] Mortgage Note Payable - Held-For-Sale with maturity date of June 2012 Represents the information pertaining to mortgage notes payable with maturity date of June 2012 secured by real estate held-for-sale by the entity. Multi-family Represents the information pertaining to multi-family assets that secure real estate mortgage loans. Real Estate, Multi Family [Member] Junior Participating Loans [Member] Junior participating loans Represents the information pertaining to junior participating loans. Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Accumulated other comprehensive loss Junior Participating Interest [Member] Junior participating interest Represents the information pertaining to a junior participating interest in a first mortgage loan. Debt Instrument, Maturity Date Length of Extension Period Option Optional extension period (in years) Length of the optional extension period of the debt instrument, which may be presented in a years. Number of Real Estate Properties Sold Number of properties sold Represents the number of real estate properties within the portfolio. Current Overcollateralization Ratio, Covenant Compliance Current overcollateralization ratio for cash flow triggers (as a percent) Represents the overcollateralization ratio maintained during the period under covenant compliance. Overcollateralization ratio is calculated by dividing the total principal balance of all collateral in the CDO by the total principal balance of the bonds associated with the applicable ratio. Overcollateralization Ratio, Covenant Compliance Limit overcollateralization ratio for cash flow triggers (as a percent) Represents the overcollateralization ratio required to be maintained under covenant compliance. Overcollateralization ratio is calculated by dividing the total principal balance of all collateral in the CDO by the total principal balance of the bonds associated with the applicable ratio. Current Interest Coverage Ratio, Covenant Compliance Current interest coverage ratio for cash flow triggers (as a percent) Represents the interest coverage ratio maintained during the period under covenant compliance. Interest coverage ratio is calculated by dividing interest income by interest expense for the classes senior to those retained by the entity. Represents the interest coverage ratio required to be maintained under covenant compliance. Interest coverage ratio is calculated by dividing interest income by interest expense for the classes senior to those retained by the entity. Interest Coverage Ratio, Covenant Compliance Limit interest coverage ratio for cash flow triggers (as a percent) Funded Interest Reserves Amount of funds placed into an interest reserve, based on contractual requirements, to cover debt service costs. Total interest reserves Funded Interest Reserves Unpaid Principal Balance Amount of unpaid principal balance of receivables with funded interest reserves. Aggregate unpaid principal balance Schedule of Charge Offs and Recoveries on Financing Receivables [Table Text Block] Summary of charge-offs and recoveries Tabular disclosure of financing receivable charge-offs and recoveries. Internal Credit Three Rating [Member] Risk rating, three Credit rating three, as defined under internal credit risk assessment. This rating is defined by the entity as the entity expects the loan to make both principal and interest payments according to the contractual terms of the loan agreement, and is not considered impaired. Internal Credit Four Rating [Member] Risk rating, four Credit rating four, as defined under internal credit risk assessment. This rating is defined by the entity as the entity expects that the loan will require a modification of some kind. Internal Credit Five Rating [Member] Risk rating, five Credit rating five, as defined under internal credit risk assessment. This rating is defined by the entity as the entity expects the loan to underperform over its term, and that there could be loss of interest and/or principal. Internal Credit Three Point Five Rating [Member] Risk rating, 3.5 Credit rating three point five, as defined under internal credit risk assessment. This rating is defined by the entity indicate loans that have characteristics of both the immediately higher and lower classifications. Internal Credit Four Point Five Rating [Member] Risk rating, 4.5 Credit rating four point five, as defined under internal credit risk assessment. This rating is defined by the entity indicate loans that have characteristics of both the immediately higher and lower classifications. Mortgage Loans on Real Estate Percentage Percent of Total Represents a category of loans on real estate expressed as a percentage of total loans on real estate. Percentage of Portfolio Mortgage Loans on Real Estate Remaining Maturity Period Wtd. Avg. Remaining Months to Maturity Represents the weighted average remaining maturity period of mortgage loans. First Dollar LTV Ratio (as percent) Represents the First Dollar LTV Ratio that is calculated by comparing the total of the company's senior most dollar and all senior lien positions within the capital stack to the fair value of the underlying collateral to determine the point at which the company will absorb a total loss of its position. First Dollar LTV Ratio Last Dollar LTV Ratio Last Dollar LTV Ratio (as percent) Represents the Last Dollar LTV Ratio that is calculated by comparing the total of the carrying value of the company's loan and all senior lien positions within the capital stack to the fair value of the underlying collateral to determine the point at which the company will initially absorb a loss. Financing Receivable Portfolio Segments Number Number of portfolio segments Represents the number of portfolio segments of financing receivables. Number of Unrelated Borrowers Number of different borrowers Represents the number of unrelated borrowers. Internal Credit Risk Rating Credit risk individual ratings Represents the individual ratings assigned to credit risk during the loan valuation and risk assessment process. Real Estate Condo [Member] Condo Represents the information pertaining to condo assets that secure real estate mortgage loans. Loans and Investments Portfolio [Member] Loans and investments portfolio Loans and investment portfolio, when it serves as a benchmark in a concentration of risk calculation, representing the sum of all reported loans and investment portfolio as of the balance sheet date. Concentration Credit Internal Risk Rating Wtd. Avg. Internal Risk Rating Represents the individual ratings assigned to credit risk during the loan valuation and risk assessment process. Additional Paid in Capital, Common Stock Additional paid-in capital Number of Impaired Loans Number of impaired loans Represents the number of impaired loans. Impaired Financing Receivables Carrying Value before, Write Down This represents the carrying value of impaired financing receivables prior to the write-down of the carrying value to the fair value of underlying collateral. Aggregate carrying value of impaired loans Allowance for Loan and Lease Losses Provision for Loss Gross Loans Previously Impaired The portion of the gross provision for loan and lease losses (before recoveries) that relates to items that were previously reserved for impairment. Loans with previous reserves Allowance for Loan and Lease Losses Provision for Loss Gross Loans not Previously Impaired The portion of the gross provision for loan and lease losses (before recoveries) that relates to items that have not previously been reserved for impairment. Loans without previous reserves Aggregate carrying value of impaired loans before reserves Impaired Financing Receivables Carrying Amount The carrying value of impaired financing receivables derived after deducting unearned revenue and other holdbacks. Carrying value Aggregate carrying value, before loan loss reserves Aggregate carrying value, before reserves Preferred Equity Investments Written Off Carrying Value Carrying value of preferred equity investments written-off Represents the carrying value of preferred equity investments written-off. Charge-offs on loans reclassified to real estate owned, net Allowance for Loan and Lease Losses Charge Offs Reclassification Real Estate Owned Reflects the amount of loans and leases that have been removed or charged-off, from both loan receivables and the reserve for credit losses due to reclassification to real estate owned. Charged-off loan loss reserves on loans reclassified to real estate owned, net Reflects the amount of loans and leases that have been removed or charged-off, from both loan receivables and the reserve for credit losses when the loan has been repaid, forgiven or sold. Charge-offs Allowance for Loan and Lease Losses Charge Offs Number of Mortgage Loans Reclassified Number of loans reclassified to real estate owned Represents the number of mortgage loan reclassified during the period. Additional Paid-in Capital Additional Paid-in Capital [Member] Number of Preferred Equity Investments Written Off Number of preferred equity investments written-off Represents the number of preferred equity investments written-off. Number of Bridge Loans Written off Number of bridge loans Represents the number of bridge loans written off during the period. Allowance for Loan and Lease Losses Net Charge Offs Ratio Ratio of net charge-offs during the period to average loans and investments outstanding during the period Represents the ratio of net charge-offs during the period to average loans and investments outstanding during the period. Mortgage Loans on Real Estate Gross Carrying Amount of Mortgages Loan carrying amount before write down The gross carrying amount before any write-off of the outstanding balance due under the mortgage loan. Loans and Leases Receivable Impaired Nonperforming Loan Loss Reserves Loan loss reserves Reflects the amount of reserves on loans on which no interest is continuing to be recognized. Loans and Leases Receivable without Loan Loss Reserves Impaired Nonperforming Loans Number of Loans Number of loans classified as non-performing which did not have loan loss reserve Reflects the number of loans which did not have loan loss reserves deemed to be questionable as to collection, on which no interest is continuing to be recognized. Loans and Leases Receivable without Loan Loss Reserves Impaired Nonperforming Nonaccrual of Interest Carrying value of loans classified as non-performing which did not have loan loss reserve Reflects the carrying amount of loans which did not have loan loss reserves on which no interest is continuing to be recognized. Financing Receivable Recorded Investment Less than 90 Days Past Due Less Than 90 Days Past Due Financing receivables on nonaccrual status that are less than 90 days past due. Financing Receivable Refinancing or Modifications Number of Loans Number of loans that were refinanced and/or modified Number of financing receivable loans, that have been refinanced and/or modified by entity. The amount of the outstanding recorded investment related to financing receivables that have been refinanced and/or modified during the period by the entity. Amount of loans that were refinanced and/or modified Financing Receivable Refinancing or Modifications Recorded Investment Financing Receivables Impaired Troubled Debt Restructuring Unfunded Commitments Unfunded commitments on modified loans classified as troubled debt restructurings Reflects the amount of the unfunded commitments related to loans considered to be troubled debt restructurings. Financing Receivable Modifications Pre Modification Weighted Average Rate of Interest Original Weighted Average Rate of Interest (as a percent) Represents the weighted average interest rate on a group of loans before modifications that the company considered to be troubled debt restructurings. Financing Receivable Modifications Post Modification Weighted Average Rate of Interest Modified Weighted Average Rate of Interest (as a percent) Represents the weighted average interest rate on a group of loans after modifications that the company considered to be troubled debt restructurings. Schedule of Real Estate Owned [Table] Schedule detailing information of real estate owned. Mortgage Loans on Real Estate Property Location [Axis] Information by location of real estate property. Mortgage Loans on Real Estate Property Location [Domain] The location of real estate properties that secure real estate mortgage loans. Real Estate Owned [Member] Real Estate owned Represents real estate owned by the entity. Real Estate Held For Sale [Member] Real Estate held for sale Represents real estate held for sale by the entity. Real Estate Owned [Line Items] Real Estate owned Mortgage Loans on Real Estate Carrying Amount of Mortgages Prior to Provision for Loan Loss Carrying value prior to provision for loan loss The carrying amount of the outstanding balance due under the mortgage loan prior to provision for loan loss. Land and Buildings, Net Real Estate Owned Represents land and buildings of real estate owned. Land and buildings, net of accumulated depreciation Land Net Real Estate Owned Represents land of real estate owned. Land Buildings Net Real Estate Owned Represents buildings of real estate owned. Buildings, net of accumulated depreciation Real Estate Owned Properties Weighted Average Occupancy Rate Weighted average occupancy rate of properties classified as real estate owned (as a percent) Represents the weighted average occupancy rate of properties classified as real estate owned. Schedule of Real Estate Held For Sale [Table] Schedule detailing quantitative information concerning real estate held for sale. Tucson [Member] Tucson, Arizona Represents the information pertaining to real estate properties located in Tucson city in Arizona. St Louis [Member] St. Louis, Missouri Represents the information pertaining to real estate properties located in St. Louis city in Missouri. Indianapolis [Member] Indianapolis, Indiana Represents the information pertaining to real estate properties located in Indianapolis city in Indiana. Assets Held For Sale Estimated Transfer Period Assets held-for-sale, originally planned transfer period Anticipated period during which the entity planned to transfer the property designated as held-for-sale to the first mortgage lender. Period to Receive Cash Flow Until Completion of Sale Period during which entity would receive cash flows from the property until sale is completed Represents the period during which the entity would be receiving cash flows from the real estate property until it is sold. Land and Buildings, Net Real Estate Held For Sale Land and buildings, net of accumulated depreciation Represents land and buildings of real estate held for sale. Loans Receivable Maturity [Axis] Represents information pertaining to loans receivable, by their maturity dates. Loans Receivable [Domain] Represents type of loans receivable by maturity dates. Maturity Date March 2014 [Member] Maturity date of March 2014 Represents the information pertaining loans receivable with the maturity date as March 2014. Maturity Date May 2015 [Member] Maturity date of May 2015 Represents information pertaining to May 2015 as the maturity date of loans receivable. Maturity Date May 2016 [Member] Maturity date of May 2016 Represents the information pertaining loans receivable with the maturity date as May 2016. Maturity Date Feb 2013 [Member] Maturity date of February 2013 Represents the information pertaining loans receivable with the maturity date as Feb 2013. Maturity Date April 2013 [Member] Maturity date of April 2013 Represents the information pertaining loans receivable with the maturity date as April 2013. Maturity Date June 2012 [Member] Maturity date of June 2012 Represents the information pertaining loans receivable with the maturity date as June 2012. Loan to Third Party Unpaid Principal Balance Loan to third party borrower, unpaid principal balance Represents the amount receivable from loan to a third party borrower for a portfolio of properties. Related Party Transaction, Amounts of Loan Purchased by Related Party Loan amount purchased by related party Represents the amount of loan on the property purchased by the related party. Related Party Transaction, Number of Properties Purchased by Related Party Number of properties purchased by the related party Represents the number of properties in the portfolio purchased by the related party. Loan to Third Party Amount Received Amount of loan that was repaid by third party Represents the amount received from loan to a third party borrower for a portfolio of properties. Related Party Transaction, Number of Mortgage Loans Secured by Property Purchased from Related Party Number of mortgage loans secured by property purchased from related party Represents the number of mortgage loans secured by property purchased from the related party. Related Party Transaction, Amount of Mortgage Loan Secured by Property Purchased from Related Party Amount of mortgage loan secured by property purchased from related party Represents the amount of mortgage loan secured by property purchased by the related party. Related Party Transaction, Amount of Bridge Loan Receivable Amount of bridge loan purchased from related party Represents the amount of bridge loan purchased from the related party. Related Party Transaction, Contribution by Related Party to Acquire Interest in Third Party Entity Contribution by related party for acquiring non-controlling interest in a third party entity Represents the contribution made by the related party for acquiring a non-controlling interest in a third party entity. Related Party Transaction, Percentage of Non Controlling Interest Acquired in Third Party Entity Percentage of non-controlling interest acquired on contribution Represents the percentage of non-controlling interest acquired on contribution. Proceeds from Sale of Investment in Joint Venture to Related Party Amount received by related party on sale of investment in joint venture to a related party Represents the amount received on sale of investment in joint venture in to a related party. Related Party Transaction, Percentage of Ownership Interest Percentage of ownership of third party entity in joint venture Represents the percentage of ownership of the third party entity in joint venture. Represents the percentage of outstanding membership interest of a related party in another related party. Percentage of Ownership of Related Party in other Related Party Percentage of outstanding membership interest of related party in another related party Related Party Transaction, Shares Held By Related Party Number of shares held by related party Represents the number of common shares held by a related party. Related Party Transaction, Percentage of Ownership Percentage of voting power held by related party Represents the percentage of voting power held by a related party. Ownership Percentage Limit Ownership interest allowed under company charter, (as a percent) Represents the maximum percentage of ownership interest allowed under the company's charter. Real Estate Held For Sale [Line Items] Real Estate held for sale Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Financing Receivable Modifications Made Considered Trouble Debt Restructurings Number of Loans The number of financing receivables that have been modified during the period that the company considered to be troubled debt restructurings. Number of loans considered to be troubled debt restructurings Financing Receivable, Modifications Made Recorded Investment The amount of the outstanding recording investment related to financing receivables modified during the period that the company considered to be troubled debt restructurings. Original Unpaid Principal Balance Financing Receivable Modifications Made Post Modification Unpaid Principal Balance The amount of unpaid principal balance (after modification) in financing receivables that have been modified during the period that the company considered to be troubled debt restructurings. Modified Unpaid Principal Balance Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income (loss) to net cash used in operating activities: Number of impaired loans Represents the number of impaired loans. Impaired Loans Number Amount Due to Related Parties to be Remitted in Next Quarter Represents the amount of obligations due to related parties which will be remitted in the next quarter. Management fees to be remitted Loan and Lease Losses Recoveries of Bad Debts Number of Loans Represents the number of loans for which there has been a reduction in bad debt expense attributable to collections of loans and lease receivables which had previously been fully or partially charged off as bad debts. Number of loans for which company has recorded net recoveries Adjustments to Additional Paid in Capital, Warrant Issued Issuance of warrants in conjunction with debt restructuring Mortgage Loans on Real Estate, Gross Carrying Amount of Mortgages Prior to Provision for Loan Loss Loan carrying value prior to provision for loan losses The gross carrying amount before any write-off of the outstanding balance due under the mortgage loan. Carrying Amount of Investment Transferred from Real Estate Owned to Held For Sale Carrying amount as of the balance sheet date of investments in land and buildings trasnferred from owned to held for sale. Reclassification value of investment transferred from real estate owned to real estate held-for-sale Affiliates Debt Instrument Principal Outstanding Unpaid Principal Balance to Equity Affiliates Amount of outstanding principal on mortgage loans due from an entity that is affiliated with the reporting entity by means of direct or indirect ownership. Management Agreement Base Management Fee Represents the amount the entity reimbursed to the manager for its actual costs incurred in managing the company's business based on the parties' agreement. Base Management Agreement Incentive Fee Incentive Represents the incentive fee charged for operating and managing the entity's business during the reporting period which is based on meeting certain profitability metrics. Charge-offs Charge-offs to previously recorded reserves Allowance for Loan and Lease Losses Total Charge Offs Reflects the total amount of loans and leases that have been removed or charged-off, from both loan receivables and the reserve for credit losses. Reflects the total amount of loans and leases that have been removed or charged-off, from both loan receivables and the reserve for credit losses, net of total recoveries for the period. Net Charge-offs Allowance for Loan and Lease Losses Total Charge Offs Net Recoveries Gain (Loss) on Sale of Mortgage Note Payable Held For Sale Gain on sale of real estate held-for-sale Represents the gain (loss) on sale of mortgage notes held-for-sale by the reporting entity. Real Estate Owned and Held-For-Sale Real Estate Owned and Held for Sale Policy [Text Block] Disclosure of accounting policy for real estate owned and held for sale. Collateral Carring Value Collateral Carrying Value, Total repurchase agreements and credit facilities Collateral Carrying Value The balance represents the carrying value of loans and securities held as collateral. Collateral Loans, Carrying Value Mortgage Loans on Real Estate Carrying Value Represents the carrying value of the mortgage loans that serve as collateral. Collateral Securities, Carrying Value Available for Sale Securities Carrying Value Represents the carrying value of available-for-sale securities that serve as collateral. Amount of retired debt instrument Early Retirement of Subordinated Debt The retirement of long-term borrowing where a lender is placed in a lien position behind debt having a higher priority of repayment (senior) in case of liquidation of the entity's assets before its maturity. Payments for Early Retirement of Subordinated Debt Cash payments for debt instrument retired Represents the amount paid for the retirement of long-term borrowing where a lender is placed in a lien position behind debt having a higher priority of repayment (senior) in case of liquidation of the entity's assets before its maturity. Collateral posted Derivative Collateral Posted The amount of the right to reclaim cash collateral. Carrying amount of the total liabilities that relate to the reporting entity's variable interest in the Variable Interest Entity (VIE). Variable Interest Entity Real Estate Debt Exposure Exposure to real estate debt Payments on Financial Instruments Underlying Linked Transactions Payments on financial instruments underlying linked transactions The cash outflow for financing RMBS investments through repurchase agreement with the same counterparty during the period , which are classified as Linked transactions. Release of Mortgage Note Payable Held For Sale Release of mortgage note payable held-for-sale Represents the amount of mortgage note payables released through noncash transactions. Satisfaction of Participation Loan Satisfaction of participation loan Represents the amount of Participation loan settled through noncash transactions. Retirement of Participation Liability Retirement of participation liability Represents the amount of Participation loan retired through noncash transactions. Reversal of Liabilities Related to Discontinued Operations Reversal of liabilities related to discontinued operations Represents the amount of reversal of liabilities upon the transfer of ownership of real estate held for sale. Held To Maturity Securities Premium Premium paid to acquire investments Represents the premium paid to acquire investments which are neither classified as trading nor available-for-sale securities. Held To Maturity Securities Discount Discount received to acquire investments Represents the discount received to acquire investments which are neither classified as trading nor available-for-sale securities. Represents the residential mortgage-backed security (RMBS) investment purchased through repurchase agreement. Residential Mortgage Backed Securities Purchased Through Repurchase Agreements [Member] RMBS investment purchased through repurchase agreement Debt Instrument Variable Rate Base [Axis] The alternative reference rates that may be used to calculate the variable interest rate of the debt instrument. Debt Instrument Variable Rate Base [Domain] Identification of the reference rate that is used to calculate the variable interest rate of the debt instrument. Debt Instrument Variable Rate LIBOR [Member] LIBOR The London Interbank Offered Rate (LIBOR) used to calculate the variable interest rate of the debt instrument. Debt Instrument Variable Rate Prime Rate [Member] Prime The prime rate used to calculate the variable interest rate of the debt instrument. Held to Maturity, Securities Purchased Number of investments purchased Represents the number of held-to-maturity securities purchased. Variable Interest Entity, Loan [Member] Loans Represents the loan in a VIE. Variable Interest Entity, Loan and Investment [Member] Loans and equity investments Represents the loan and investment in a VIE. Variable Interest Entity, Residential Mortgage Backed Securities [Member] RMBS Represents the investment in securities collateralized by residential real estate mortgage loans, of a VIE. Variable Interest Entity, Commercial Mortgage Backed Securities [Member] CMBS Represents the investment in securities collateralized by commercial real estate mortgage loans, of a VIE. Variable Interest Entity, Collateralized Debt Obligation Bonds [Member] CDO Bonds Represents the investment in securities collateralized by a pool of assets, of a VIE. Variable Interest Entity, Junior Subordinated Debt [Member] Junior subordinated notes Represents the investment in junior subordinated notes, of a VIE. Variable Interest Entity, Exposure to Loss Exposure to loss Represents the exposure to loss on investments that relate to the reporting entity's variable interest in the Variable Interest Entity (VIE). Direct Capitalization, Analysis and Discounted Cash Flows [Member] Direct capitalization analysis and discounted cash flows Direct capitalization analysis and discounted cash flows valuation technique used to measure fair value. Discounted Cash Flows [Member] Discounted cash flows Discounted cash flows valuation technique used to measure fair value. Comparable Sales [Member] Comparable sales Comparable sales valuation technique used to measure fair value. Broker quotes valuation technique used to measure fair value. Broker Quotes [Member] Broker quotes Commercial Mortgage Backed Securities, Fair Value Disclosure CMBS Represents the fair value of securities collateralized by commercial real estate mortgage loans. Equity Method Investments Ownership Transferred Ownership transferred Represents the ownership of the underlying equity transferred. Amount of New Debt Guaranteed Amount of new debt guaranteed Represents the amount of new debt guaranteed. Mortgage Loans on Real Estate Excess Proceeds from Loans Distributed to Members in Accordance with Operating Agreement Excess proceeds from loans distributed to members in accordance with operating agreement Represents the excess proceeds from mortgage loans on real estate distributed to members in accordance with operating agreement. Return of Capital from Contribution Return of capital from contribution Represents the return of capital from contribution. Interest received Collateralized Debt, Obligation Bonds, Fair Value Disclosure CDO Bonds Represents the fair value of securities collateralized by a pool of assets. Fair Value, Inputs Price Per Acre Dollar per acre Cost of construction of real property stated is a price per acre, used as an input to measure fair value. Non Management Members [Member] Non-management members Represents information pertaining to non-management members. Director who was Corporate Secretary [Member] Director who was also the corporate secretary Represents the director who was also the corporate secretary of the entity. Director who is Officer of Managing Member of Related Party [Member] Director is also an officer of the managing member of related party Represents the director is also an officer of the managing member of related party of the entity. Reappointed Director [Member] Director who was re-appointed to the board of directors on December 19, 2011 Represents the director who was re-appointed to the Board of Directors of the entity. Title of Individual by Relationship to Entity [Domain] Title of the individual or the nature of the entity's relationship with the individual. Fred Weber [Member] Mr. Fred Weber Represents information pertaining to Mr. Fred Weber, the chairman and chief executive officer of the entity. Title of Individual by Relationship to Entity [Axis] Information by title of individual party related to the entity. Ownership Percentage Limit Before Amendment Ownership interest allowed under company charter before amendment (as a percent) Represents the maximum percentage of ownership interest allowed under the company's charter before amendment. Mortgage Loans on Real Estate, Number of Options to Extend Loan Number of options to extend loan Represents the number of options to extend the mortgage loans on real estate. Mortgage Loans on Real Estate Extended Period of Loan Extended period of loan Represents the extended period of mortgage loans on real estate. Estimated Period of Tax Deferral Estimated period of tax deferral Represents the estimated period of tax deferral. Guarantee Obligations Extended Period Extended period of guarantee Represents the extended period of guarantee provided for debt. Mortgage Loans on Real Estate, Number of Properties Refinanced Number of properties refinanced Represents the number of properties refinanced under mortgage loans on real estate. Equity Method Investments Ownership Interest Retained Ownership interest retained Represents the ownership interest retained by the entity. Equity Method Investments Property Air Rights Retained Property air rights retained Represents the property air rights retained by the entity. Prepaid Management Fees Prepaid management fees Represents the management fees paid in advance by the entity. Equity Method Investment Preferred Return on Investments Percentage Preferred return on investment (as a percent) Represents the percentage of preferred return on investment for the noncontrolling interest acquired in the equity method investment. Alternative Minimum Tax Federal Alternative minimum tax Represents the amount of federal alternative minimum tax recorded during the reporting period. Bridge Loans Mezzanine Loan and Preferred Equity Investment [Member] Bridge loans, a mezzanine loan and a preferred equity investment Represents information pertaining to bridge loans, a mezzanine loan and a preferred equity investment of the entity. Bridge Loan and Preferred Equity Loan [Member] Bridge loan and a preferred equity loan Represents information pertaining to a bridge loan and a preferred equity loan of the entity. Fifth 200 LLC Partnership [Member] 200 Fifth LLC Represents information pertaining to 200 Fifth LLC partnership. Amount financed for recapitalization of partnership Amount Financed for recapitalization of partnership Represents the amount financed for recapitalization of partnership. Amount Financed for Recapitalization of Partnership from Unfunded Portion Unfunded portion used to finance recapitalization of partnership Represents the portion funded by the unfunded portion to be used to develop the property, now used to finance recapitalization of partnership. Represents the notional amount of preferred shares issued and sold to a consolidated subsidiary. Preferred Stock Notional Amount Notional amount of equity interest retained Equity Method Investment, Estimated Additional Cost Estimated additional costs Represents information pertaining to the estimated additional costs to be incurred in connection with the closing of the equity method investment transaction. Collateralized Loan Obligations Collateralized loan obligation (includes $87,500,000 and $0 from consolidated VIEs, respectively) Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized loan obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower. Collateralized loan obligation Additional Shares for which Over Allotment Option was Granted to Underwriter Additional shares for which an over-allotment option was granted to the underwriter Represents the number of additional shares for which an over-allotment option was granted to the underwriter. Preferred Equity Loan [Member] Preferred equity loan Represents information pertaining to the preferred equity loan of the entity. Debt Weighted Average Interest Rate Including Fees and Costs Weighted average note rate including certain fees and costs (as a percent) Represents the calculation as of the balance sheet date of the average interest rate weighted by the amount of debt outstanding, including certain fees and costs. Collateralized Loan Obligations One [Member] CLO - Issued two investment grade tranches September 24, 2012. Replacement period through September 2014. Stated maturity date of October 2022. Interest is variable based on three-month LIBOR; the weighted average note rate was 3.66% Represents information pertaining to securities collateralized by a pool of assets and whose replacement period is through September 2014, stated maturity date of October 2022 and interest is variable based on three-month LIBOR. Collateralized Loan Obligations Class A Senior Secured Floating Rate Notes [Member] Class A senior secured floating rate notes Represents information pertaining to investment grade rated Class A senior secured floating rate notes issued by the CLO issuing entity. Collateralized Loan Obligations Class B Secured Floating Rate Notes [Member] Class B secured floating rate notes Represents information pertaining to investment grade rated Class B secured floating rate notes issued by the CLO issuing entity. Debt Instrument Financing Replacement Period Replacement period Represents the replacement period of financing that allows the principal proceeds and sale proceeds (if any) of the loan obligations to be reinvested in qualifying replacement loan obligations. Debt Instrument Classes of Secured Floating Rate Notes, Number Number of classes of secured floating rate notes Represents the number of classes of secured floating rate notes. Land and Land Improvements and Hotel [Member] Land and Hotel Represents real estate held and assets that are an addition or improvement to real estate held and also assets including hotels. Allowance for Loan and Lease Losses, Recoveries of Bad Debts Net recoveries of previously recorded loan loss reserves Recoveries of reserves Recoveries Non-cash recovery of previously recorded reserve Allowance for Credit Losses on Financing Receivables [Table Text Block] Summary of the changes in the allowance for loan losses Allowance for Doubtful Accounts Receivable, Charge-offs Charge-offs to the allowance for loan losses Allowance for Loan and Lease Losses, Provision for Loss, Gross Impaired loans, provision for loan losses Allowance for Loan and Lease Losses [Roll Forward] Changes in allowance for loan losses Amortization of Deferred Hedge Gains Additional interest expense related to the amortization of the loss Amortization of Debt Discount (Premium) Amount charged to interest expense as a result of amortization of discount on participating loan Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Number of warrants that did not have a dilutive effect (in shares) Assets [Abstract] Assets: Assets Total assets Assets, Total [Member] Total assets Available-for-sale securities, at fair value Available-for-sale securities Carrying Value / Estimated Fair Value Available-for-sale Securities, Fair Value Disclosure Available-for-sale Securities Available-for-sale securities, at fair value Available-for-sale securities, at fair value (includes $1,100,000 and $2,000,000 from consolidated VIEs, respectively) Available-for-sale Securities, Gross Unrealized Gain (Loss) Cumulative Unrealized Gain Available-for-sale Securities Pledged as Collateral Collateral Securities, Fair Value Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss), Net of Tax Net unrealized gain recorded in accumulated other comprehensive loss Available-for-sale Securities, Amortized Cost Basis Amortized Cost Carrying value Basis Swap [Member] Basis Swaps Basis of Accounting, Policy [Policy Text Block] Basis of Presentation and Principles of Consolidation Bridge Loan [Member] Bridge loans Bridge loan Carrying (Reported) Amount, Fair Value Disclosure [Member] Carrying Value Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Restricted Cash Cash and Cash Equivalents, Period Increase (Decrease) Net decrease in cash and cash equivalents Cash and Cash Equivalents [Abstract] Cash and Cash Equivalents Cash and Cash Equivalents, Unrestricted Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Supplemental schedule of non-cash investing and financing activities: Class of Warrant or Right [Table] Class of Warrant or Right [Line Items] Warrants Class of Warrant or Right [Domain] Class of Warrant or Right [Axis] Class of Warrant or Right, Exercise Price of Warrants or Rights Exercise price (in dollars per share) Variable Interest Entity, Classification [Domain] Co-venturer [Member] Joint venture members Collateralized Debt Obligations [Member] Collateralized debt obligations Collateralized debt obligation (CDO) bond CDO bond Collateralized loan obligations Collateralized Loan Obligations [Member] Collateralized loan obligation Commercial Mortgage Backed Securities [Member] Commercial mortgage-backed security (CMBS) CMBS Commercial Real Estate [Member] Commercial Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Commitments and Contingencies. Commitments and Contingencies Commitments and contingencies Common Stock Common Stock [Member] Common equity securities Common Stock, Shares, Outstanding Common stock, shares outstanding (in shares) Common stock outstanding (in shares) Common Stock, Value, Issued Common stock, $0.01 par value: 500,000,000 shares authorized; 30,399,992 shares issued, 27,749,225 shares outstanding at September 30, 2012 and 26,778,737 shares issued, 24,298,140 shares outstanding at December 31, 2011 Common Stock, Shares, Issued Common stock, shares issued (in shares) Common Stock, Dividends, Per Share, Declared Dividends declared per common share (in dollars per share) Cash dividend declared (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Common Stock, Shares Authorized Common stock, shares authorized (in shares) Number of shares of common stock authorized for issuance Comprehensive income (loss) attributable to Arbor Realty Trust, Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Less: Comprehensive income attributable to noncontrolling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive Income, Policy [Policy Text Block] Other Comprehensive Income / (Loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income Comprehensive income (loss) Comprehensive (Loss) Income Comprehensive Income [Member] Concentration Risk Type [Domain] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Axis] Concentration Risk Type [Axis] Concentration Risk, Percentage Concentration risk, percentage Consolidation, Variable Interest Entity, Policy [Policy Text Block] Variable Interest Entities Contractual Obligation, Due in Second Year 2014 Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block] Schedule of material contractual obligations Contractual Obligation, Due in Fourth Year 2016 Contractual Obligation, Due in Next Twelve Months 2013 Contractual Obligation, Due in Third Year 2015 Contractual Obligation, Fiscal Year Maturity [Abstract] Contractual Obligations, Payments Due by Period Contractual Obligation Total Other joint ventures Corporate Joint Venture [Member] Cost and Equity Method Investments Disclosure [Text Block] Investment in Equity Affiliates Cost of Real Estate Revenue Property operating expenses Credit Rating [Domain] Credit Concentration Risk [Member] Credit risk concentration Designated as Hedging Instrument [Member] Qualifying Debt Instrument, Description of Variable Rate Basis Variable interest rate, description Description of variable rate basis Debt Instrument [Line Items] Debt Obligations Debt Covenants Schedule of Long-term Debt Instruments [Table] Debt, Weighted Average Interest Rate Weighted average note rate (as a percent) Debt Security [Axis] Debt Disclosure [Text Block] Debt Obligations Debt Obligations Debt Instrument, Repurchased Face Amount Repurchase amount Face Amount Debt Instrument, Basis Spread on Variable Rate Variable rate, spread (as a percent) Weighted average spread (as a percent) Variable rate, spread (as a percent) Debt Instrument [Axis] Debt Instrument, Decrease, Repayments Reduction of outstanding debt balance Debt paid down due to principal paydowns received Payment of debt Face Amount Debt sold to third party Debt Instrument, Face Amount Debt, Face Value Face amount of debt instrument re-issued Face amount Issuance costs Debt Issuance Cost Debt Instrument, Interest Rate, Effective Percentage Effective rate (as a percent) Debt Instrument, Name [Domain] Debt Instrument, Increase, Additional Borrowings Newly issued debt instrument New note payable Debt Securities [Member] CDO bond and CMBS investments Debt Instrument, Unamortized Discount (Premium), Net Deferred amount Debt Instrument, Interest Rate, Stated Percentage Interest rate (as a percent) Deferred Compensation Arrangement with Individual, Shares Issued Number of fully vested shares issued Deferred Compensation Arrangement with Individual, Allocated Share-based Compensation Expense Accrued deferred compensation expense Deferred Bonus and Profit Sharing Plan by Title of Individual [Axis] Deferred Revenue Deferred revenue Deferred revenue recognized on transfer of control of 450 West 33rd Street property Deferred revenue recorded as a result of the guarantee on a portion of the new debt Deferred Discounts, Finance Charges and Interest Included in Receivables Unearned revenue Deferred tax asset Deferred Income Tax Expense (Benefit) Deferred tax asset on equity affiliate Deferred Tax Assets, Equity Method Investments Valuation allowance against the deferred tax asset Deferred Tax Assets, Valuation Allowance Depreciation, Depletion and Amortization, Nonproduction Depreciation and amortization Depreciation Depreciation, discontinued operations Depreciation, Amortization and Accretion, Net Depreciation and amortization Derivative Asset, Notional Amount Notional Value, classified in Other Assets Derivative Instrument Risk [Axis] Derivative Assets Derivative financial instruments Forward Contract Derivatives Derivative Instruments and Hedging Activities Disclosure [Text Block] Derivative Financial Instruments Derivative Liability, Notional Amount Notional Value, classified in Other Liabilities Derivative Asset, Fair Value, Gross Liability Repurchase financing Derivative Financial Instruments, Liabilities, Fair Value Disclosure Derivative financial instruments Derivative Financial Instruments Derivative Asset, Fair Value, Gross Asset Fair Value, classified in Other Assets Derivative, Gain (Loss) on Derivative, Net Change in fair value Derivative, Cap Interest Rate Cap rate (as a percent) Derivative Liability, Fair Value, Gross Liability Fair Value, classified in Other Liabilities Derivative, Number of Instruments Held Count Derivative Instruments, Gain (Loss) Recognized in Income, Net Amount of Gain (Loss) Recognized in income Derivative Contract Type [Domain] Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion Amount of Loss Reclassified from Accumulated Other Comprehensive Loss into Interest Expense (Effective Portion) Derivative, Net Liability Position, Aggregate Fair Value Fair value of derivatives in a net liability position Total principal paydowns Derivative Instruments, Gain (Loss) [Line Items] Derivative Financial Instruments Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net Amount of Loss Recognized in Other Comprehensive Loss (Effective Portion) Derivatives, Policy [Policy Text Block] Hedging Activities and Derivatives Derivatives, Fair Value [Line Items] Derivative Financial Instruments Director [Member] Director Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax Gain on sale of real estate held-for-sale Gain on sale of real estate held-for-sale Income (loss) from operations of real estate held-for-sale Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax Disposal Group, Including Discontinued Operation, Operating Expense Property operating expense, discontinued operations Distributions - common stock Dividends, Common Stock Dividends, Preferred Stock Distributions - preferred stock of private REIT Due to Related Parties Due to related party Due from Related Parties Due from related party Due from related party (includes $267,158 and $1,217 from consolidated VIEs, respectively) Receivable from related party Earnings Per Share, Basic [Abstract] Basic earnings (loss) per common share: Earnings Per Share, Diluted Net income (loss) attributable to Arbor Realty Trust, Inc. (in dollars per share) Earnings Per Share, Basic, Other Disclosures [Abstract] Basic Earnings Per Share, Diluted [Abstract] Diluted earnings (loss) per common share: Earnings Per Share, Basic Net income (loss) attributable to Arbor Realty Trust, Inc. (in dollars per share) Earnings Per Share, Diluted, Other Disclosures [Abstract] Diluted Earnings Per Share [Text Block] Earnings Per Share Earnings Per Share Equity Method Investments, Policy [Policy Text Block] Investment in Equity Affiliates Deferred gain on equity affiliate Equity Method Investment, Deferred Gain on Sale Equity Method Investments Equity investment, balance Equity Method Investment, Other than Temporary Impairment Other-than-temporary impairment Other-than-temporary impairment on remaining amount of investment Equity Method Investment, Ownership Percentage Voting interest in entities accounted for primarily under the equity method (as a percent) Ownership interest (as a percent) Retained interest (as a percent) Proceeds from Equity Method Investment, Dividends or Distributions Distributions of operations from equity affiliates Equity Component [Domain] Estimate of Fair Value, Fair Value Disclosure [Member] Fair Value Extinguishment of Debt, Amount Extinguishment of notes payable Amount of debt instrument purchased from third party investor Measurement Frequency [Axis] Fair Value by Asset Class [Domain] Fair Value, Hierarchy [Axis] Fair Value Inputs, Discount Rate Discount rate (as a percent) Fair Value Inputs, Cap Rate Capitalization rate (as a percent) Fair Value, Measurements, Recurring [Member] Recurring basis Fair Value Inputs, Assets, Quantitative Information [Table Text Block] Schedule of quantitative information about Level 3 Fair Value Measurements on a recurring and non-recurring basis Fair Value Inputs, Assets, Quantitative Information [Table] Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] Fair value of these assets and liabilities Fair Value, Measurement Frequency [Domain] Fair Value Measurements, Recurring and Nonrecurring [Table] Asset Class [Axis] Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Net accretion and amortization Fair Value Inputs, Assets, Quantitative Information [Line Items] Quantitative information about Level 3 Fair Value Measurements on a recurring and non-recurring basis Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Schedule of fair value of assets and liabilities Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value Measurement Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Changes in unrealized gain Fair Value Inputs, Long-term Revenue Growth Rate Revenue growth rate (as a percent) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Additions Fair Value Fair Value Disclosures [Text Block] Fair Value Fair Value, Measurements, Nonrecurring [Member] Nonrecurring basis Fair Value, Adjustment Disclosure [Abstract] Adjustments to fair value: Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Schedule of financial assets measured at fair value on a recurring basis using Level 3 inputs Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Financial assets Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value of Financial Instruments Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Reconciliation of the beginning and ending balances of financial assets measured at fair value on a recurring basis using Level 3 inputs Fair Value Measurements, Nonrecurring [Table Text Block] Schedule of certain financial and non-financial assets measured at fair value on a nonrecurring basis Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, by Balance Sheet Grouping [Table Text Block] Summary of the carrying values and the estimated fair values of the Company's financial instruments Fair Value, Disclosure Item Amounts [Domain] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis] Fair Value, Inputs, Level 3 [Member] Level 3 Fair Value, Inputs, Level 1 [Member] Level 1 Fair Value, Inputs, Level 2 [Member] Level 2 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Balance at the beginning of the period Balance at the end of the period Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fees and Commissions, Other Other income Finance, Loans and Leases Receivable, Policy [Policy Text Block] Loans, Investments and Securities Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Financial liabilities: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Financial assets: Financing Receivable, Recorded Investment, Past Due [Line Items] Non-performing loans by asset class Financing Receivable, Modifications [Line Items] Troubled debt restructurings by asset class Financing Receivable, Recorded Investment, Nonaccrual Status Carrying Value Credit Quality Indicator [Axis] Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due Greater Than 90 Days Past Due Financing Receivable, Impaired [Line Items] Revenue Recognition Financing Receivable, by Credit Quality Indicator [Domain] Financing Receivable Credit Quality Indicators [Table Text Block] Summary of the loan portfolio's weighted average internal risk ratings and LTV ratios by asset class First mortgage First Mortgage [Member] Forward Contracts [Member] Forward Contracts Forward Contract Derivatives Derivative Financial Instruments Gain (Loss) on Sale of Derivatives Loss on termination of swaps Loss on termination of swaps Gain (Loss) on Sale of Securities, Net Gain on sale of real estate held-for-sale Gains (Losses) on Extinguishment of Debt Gain on extinguishment of debt Gain on extinguishment of debt Gain Hedging Designation [Axis] Hedging Designation [Domain] Held-to-maturity Securities Securities held-to-maturity, net Carrying Value Securities held-to-maturity, net (includes $730,480 and $742,602 from consolidated VIEs, respectively) Held-to-maturity Securities, Unrecognized Holding Loss Unrealized Loss Summary of the company's securities classified as held-to-maturity Held-to-maturity Securities [Table Text Block] Held-to-maturity Securities, Debt Maturities, Rolling Year Two Through Five, Fair Value Maturing after one year through five years Held-to-maturity Securities, Debt Maturities, Next Rolling Twelve Months, Fair Value Maturing within one year Held-to-maturity Securities, Debt Maturities, Rolling after Ten Years, Fair Value Maturing after ten years Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment Amortized Cost Held-to-maturity Securities, Fair Value Securities held-to-maturity, net Estimated Fair Value Net fair value Hotel [Member] Hotel Held-to-maturity Securities, Unrecognized Holding Gain Unrealized Gain Held-to-maturity Securities [Member] Held-to-maturity securities Impaired Financing Receivable, Policy [Policy Text Block] Impaired Loans, Allowance for Loan Losses, Loss on Sale and Restructuring of Loans and Charge-offs Impaired Financing Receivable, with Related Allowance, Average Recorded Investment Average Recorded Investment Impaired Financing Receivables [Table Text Block] Summary of the company's impaired loans by asset class Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method Interest Income Recognized Impaired Financing Receivable, Unpaid Principal Balance Impaired Financing Receivable, Recorded Investment Impaired loans, net Impaired loans Impaired Financing Receivable, Related Allowance Allowance for Loan losses Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance Unpaid Principal Balance Impaired Financing Receivable, Interest Income, Accrual Method Impairment of Real Estate Loss on impairment of real estate held-for-sale Impairment loss on real estate held-for-sale Impairment loss Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Income (loss) from discontinued operations Income (loss) from discontinued operations Property operating income, discontinued operations Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income (loss) before (provision) benefit for income taxes Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share Income (loss) from discontinued operations (in dollars per share) Loss from discontinued operations per common share (in dollars per share) CONSOLIDATED STATEMENTS OF OPERATIONS Income Statement Location [Axis] Income Taxes Income Tax Disclosure [Text Block] Income Taxes Income Taxes Income (Loss) from Continuing Operations Attributable to Parent Income (loss) from continuing operations, net of noncontrolling interest Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share Income (loss) from discontinued operations (in dollars per share) Loss from discontinued operations per common share (in dollars per share) Income Statement Location [Domain] Income (Loss) Attributable to Noncontrolling Interest Income attributable to noncontrolling interest Income (Loss) from Equity Method Investments Loss (income) from equity affiliates (Loss) income from equity affiliates Income (Loss) from Continuing Operations, Per Basic Share Income (loss) from continuing operations, net of noncontrolling interest (in dollars per share) Income (loss) from continuing operations, net of noncontrolling interest, per common share (in dollars per share) Income (Loss) from Continuing Operations, Per Diluted Share Income (loss) from continuing operations, net of noncontrolling interest (in dollars per share) Income (loss) from continuing operations, net of noncontrolling interest, per common share (in dollars per share) Income Tax Expense (Benefit) (Provision) benefit for income taxes Income Taxes Receivable Income tax receivable for the expected refund of income taxes paid by a taxable REIT subsidiary Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest Income (loss) from continuing operations Income Tax, Policy [Policy Text Block] Income Taxes Income Taxes Paid Cash used for taxes Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Income (loss) from discontinued operations Increase (Decrease) in Due from Related Parties, Current Due to/from related party Increase (Decrease) in Deferred Revenue Deferred fees Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Increase (Decrease) in Fair Value of Derivative Instruments, Not Designated as Hedging Instruments Change in fair value of non-qualifying swaps Increase (Decrease) in Other Operating Assets Other assets Increase (Decrease) in Other Operating Liabilities Other liabilities Increase (Decrease) in Restricted Cash Change in restricted cash Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity Incremental Common Shares Attributable to Call Options and Warrants Dilutive effect of warrants (in shares) Interest Expense Interest expense Interest Income (Expense), Net Net interest income Net interest income Interest Income, Operating Interest income Interest Rate Swap [Member] Interest Rate Swaps Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Interest expense expected to be reclassified from qualifying cash flow hedges over the next twelve months Interest Paid Cash used to pay interest Interest Rate Cap [Member] LIBOR Caps Interest Expense [Member] Interest Expense Inventory, Real Estate, Held-for-sale Real estate held-for-sale, net (includes $0 and $2,550,000 from consolidated VIEs, respectively) Real estate held-for-sale, net Investment Income, Amortization of Premium Premium amortized into interest income Investment Type Categorization [Domain] Investment Income, Net, Amortization of Discount and Premium Premium amortized/accretion of discount into interest income Net interest income Investment Owned, at Fair Value Fair value of real estate owned Investment Owned, Balance, Shares Number of shares of common stock purchased Investment Type [Axis] Investment Holdings [Table] Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Investment in equity affiliates Investment in Equity Affiliates Investments in and Advances to Affiliates [Line Items] Investment in Equity Affiliates Investments in and Advances to Affiliates [Table Text Block] Summary of the company's investment in equity affiliates Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Securities Securities Investments in and Advances to Affiliates [Table] Junior Loans [Member] Junior participating loans Junior Subordinated Debt [Member] Junior subordinated notes Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust Junior subordinated notes to subsidiary trust issuing preferred securities Carrying value Junior subordinated notes Debt Carrying Value Labor and Related Expense Employee compensation and benefits Land and Land Improvements [Member] Land Liabilities Total liabilities Liabilities and Equity [Abstract] Liabilities and Equity: Liabilities and Equity Total liabilities and equity Line of Credit Facility, Maximum Borrowing Capacity Committed line Revolving note amount Commitment fee upon closing (as a percent) Line of Credit Facility, Commitment Fee Percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Non-use fee (as a percent) Line of Credit Facility, Interest Rate at Period End Fixed interest rate (as a percent) Line of Credit Facility, Amount Outstanding Outstanding balance of facility Litigation Case Type [Domain] Litigation Case [Axis] Loans and Leases Receivable Disclosure [Abstract] Impaired Loans, Allowance for Loan Losses, Loss on Sale and Restructuring of Loans and Charge-offs Loans Receivable, Basis Spread on Variable Rate Base spread (as a percent) Loans and Leases Receivable, Allowance Loan loss reserves related to VIEs Allowance for loan losses Allowance at beginning of the period Allowance at end of the period Provision for loan losses Loans Receivable, Description of Variable Rate Basis Base rate Loans Held-for-sale, Mortgages Loan held-for-sale Unpaid principal balance of loans classified as held-for-sale Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Loans and Investments Long-term Debt Outstanding amount of new debt Outstanding debt Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate Fixed interest rate (as a percent) Loss Contingency, New Claims Filed, Number Number of lawsuits or complaints filed Loss Contingencies [Table] Loss Contingency, Damages Sought, Value Total damages that the plaintiff is seeking Loss Contingency, Number of Defendants Number of defendants Loss Contingency Nature [Axis] Loss Contingencies [Line Items] Litigation Loss Contingency, Nature [Domain] Major Types of Debt Securities [Domain] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Maximum Maximum [Member] Less than Minimum Minimum [Member] Noncontrolling Interest Noncontrolling Interest Disclosure [Text Block] Stockholders' Equity Attributable to Noncontrolling Interest Noncontrolling interest in consolidated entity Noncontrolling interest in entity Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Distribution to non-controlling interest Distribution to noncontrolling interest Noncontrolling Interest, Ownership Percentage by Parent Voting interest owned by the company for consolidation (as a percent) Mortgage Loans on Real Estate, by Loan Disclosure [Text Block] SCHEDULE IV-LOANS AND OTHER LENDING INVESTMENTS Mortgage Loans on Real Estate, Interest Rate Fixed rate of interest (as a percent) Wtd. Avg. Pay Rate (as a percent) Weighted average interest rate (as a percent) Weighted average variable interest rate (as a percent) Preferred interest in a joint venture (as a percent) Mortgage Loans on Real Estate, Loan Category [Domain] New mortgage note payable assumed Mortgage Loans on Real Estate, New Mortgage Loans Mortgage Loans on Real Estate, Loan Type [Domain] Real Estate, Type of Property [Axis] SCHEDULE IV-LOANS AND OTHER LENDING INVESTMENTS Mortgage Loans on Real Estate [Line Items] Loan and investment portfolio Mortgage Loans on Real Estate Schedule [Table] Mortgage Loans on Real Estate, Face Amount of Mortgages Principal balance Non-recourse loan, unpaid principal balance Real Estate, Property Type [Domain] Mortgage Loans on Real Estate, Number of Loans Number of loans Loan Count Mortgage Loans on Real Estate, Loan Type [Axis] Mortgage Loans on Real Estate, Description, Loan Category [Axis] Mortgage Loans on Real Estate, Carrying Amount of Mortgages Loans to VIEs Carrying value of loans before loan loss reserves Collateral Loans, Carrying Value Loans and investments, gross Unpaid Principal Balance Mortgage Loans on Real Estate, Commercial and Consumer, Net Loans and investments, net (includes $1,131,180,388 and $1,093,893,014 from consolidated VIEs, respectively) Loans and investments, net Collateral Carrying Value, Total repurchase agreements and credit facilities Collateral Carrying Value Secured amount of loan Nonperforming Financing Receivable [Member] Non-performing loans Non-performing Financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Net income (loss) attributable to Arbor Realty Trust, Inc. Net Income (Loss) Available to Common Stockholders, Basic Net (loss) income Net cash provided by / (used in) investing activities Net Cash Provided by (Used in) Investing Activities Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] Operating activities: Net Cash Provided by (Used in) Operating Activities Net cash provided by / (used in) operating activities Net Income (Loss) Attributable to Noncontrolling Interest Net income attributable to noncontrolling interest New Accounting Pronouncements, Policy [Policy Text Block] Recently Issued Accounting Pronouncements Non-Recourse Debt Non-recourse junior loan participation amount at a discount Notes Assumed Assumption of mortgage notes payable - real estate owned Notes Payable, Other Payables [Member] Notes payable Notes Payable Debt Carrying Value Notes Payable, Fair Value Disclosure Notes payable Number of Real Estate Properties Number of real estate owned properties Number of commercial properties Number of properties owned Noncontrolling Interest Noncontrolling Interest Non-controlling Interest Noncontrolling Interest [Member] Not Designated as Hedging Instrument [Member] Non-Qualifying Office Building [Member] Office Office building Operating Expenses [Abstract] Other expenses: Operating Expenses Total other expenses Description of Business / Form of Ownership Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Description of Business / Form of Ownership Other Assets Other assets Other assets (includes $12,643,180 and $11,696,071 from consolidated VIEs, respectively) Other Income [Abstract] Other revenue: Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax Reclassification of net realized loss on derivatives designated as cash flow hedges into earnings Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Unrealized loss on derivative financial instruments, net Unrealized loss on derivative financial instruments, net Other Income Total other revenue Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Unrealized loss on securities available-for-sale, net Unrealized (loss) gain on securities available-for-sale, net Other Liabilities Other liabilities Other liabilities (includes $24,314,438 and $27,839,757 from consolidated VIEs, respectively) Other Income [Member] Other Income Past Due Financing Receivables [Table Text Block] Summary of the company's non-performing loans by asset class Total Arbor Realty Trust, Inc. Stockholders' Equity Parent [Member] Partnerships Partnership [Member] Credit Rating [Axis] Payments for Hedge, Financing Activities Payments on swaps to hedge counterparties Payments for Repurchase of Common Stock Purchases of treasury stock Expenses paid on issuance of common stock Payments of Stock Issuance Costs Payments to Acquire and Develop Real Estate Investment in real estate, net Payments to Acquire Interest in Subsidiaries and Affiliates Contributions to equity affiliates Payments of Ordinary Dividends, Preferred Stock and Preference Stock Distributions paid on preferred stock of private REIT Purchases of available-for-sale securities Payments to Acquire Available-for-sale Securities Purchase price Payments to Acquire Equity Method Investments Noncontrolling interest Equity investment made Distributions paid on common stock Payments of Ordinary Dividends, Common Stock Purchase of securities held-to-maturity, net Payments to Acquire Held-to-maturity Securities Purchase price Investments purchased Payments of Financing Costs Payment of deferred financing costs Payments to Noncontrolling Interests Distributions paid to noncontrolling interest Preferred Stock, Value, Issued Preferred stock, $0.01 par value: 100,000,000 shares authorized; no shares issued or outstanding Preferred Stock, Shares Authorized Preferred stock, shares authorized (in shares) Number of shares of preferred stock authorized for issuance Preferred Stock, Shares Issued Preferred stock, shares issued (in shares) Preferred Stock, Par or Stated Value Per Share Preferred stock, par value (in dollars per share) Preferred stock, par value (in dollars per share) Preferred Stock, Shares Outstanding Preferred stock, shares outstanding (in shares) Prepaid Expense Prepaid management fee - related party Incentive fee installment recorded as prepaid management fee President [Member] Mr. Ivan Kaufman Proceeds from Contributions from Affiliates Distributions from equity affiliates Proceeds from (Repayments of) Notes Payable Proceeds from repurchase agreements, loan participations, credit facilities and notes payable Proceeds from sale of properties Net proceeds from exercise of warrants Proceeds from Warrant Exercises Proceeds from Hedge, Financing Activities Receipts on swaps from hedge counterparties Change in restricted cash Proceeds from (Repayments of) Restricted Cash, Financing Activities Change in restricted cash Proceeds from Collection of Loans Held-for-sale Deposits received relating to loan held-for-sale Private equity offering, gross proceeds Proceeds from Issuance of Private Placement Proceeds from Issuance of Secured Debt Proceeds from collateralized debt obligations Proceeds from issuance of common stock Proceeds from Issuance of Common Stock Proceeds from issuance of shares under public offering Proceeds from exercise of warrants Proceeds from Issuance of Warrants Tax refund Proceeds from Income Tax Refunds Principal collection on securities held-to-maturity, net Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities Total principal paydowns Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities Principal collection on available-for-sale securities Proceeds from Sale of Available-for-sale Securities Proceeds from sale of available-for-sale securities Proceeds from Sale of Loans Receivable Proceeds from sale of loan Sale value of loan Proceeds from sale of real estate, net Proceeds from Sale of Real Estate Held-for-investment Net proceeds from sale of property Proceeds from sale of securities held-to-maturity, net Proceeds from Sale of Held-to-maturity Securities Proceeds from Sale of Real Estate Proceeds from sale of property Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income Net income (loss) Net income (loss) Provision for Loan and Lease Losses Provision for loan losses (net of recoveries) Summary Quarterly Consolidated Financial Information-Unaudited Quarterly Financial Information [Text Block] Summary Quarterly Consolidated Financial Information-Unaudited Range [Axis] Range [Domain] Real Estate Owned and Held-For-Sale Real Estate Properties [Domain] Real Estate Property Ownership [Axis] Real Estate Investment Property, Net Real estate owned, net Real estate owned, net (includes $83,099,540 and $83,099,540 from consolidated VIEs, respectively) Approximate aggregate carrying value of loans reclassified to real estate owned Real Estate Disclosure [Text Block] Real Estate Owned and Held-For-Sale Real Estate Revenue, Net Property operating income Property operating income relating to real estate owned properties Loans and Investments Related Party Fees and Other Arrangements, Limited Liability Company (LLC) or Limited Partnership (LP) [Abstract] Management Fees: Related Party Transactions Disclosure [Text Block] Related Party Transactions Management fee - related party Total Management fee Related Party Costs Related Party Transaction [Line Items] Related party transactions Related Party [Domain] Related Party Transactions Related Party [Axis] Repayments of Bank Debt Paydowns and payoffs of repurchase agreements, notes payable and credit facilities Repayments of Related Party Debt Payoff of notes payable-related party Repayments of Notes Payable Payoff and paydown of mortgage notes payable Repayments of Secured Debt Payoffs and paydowns of collateralized debt obligations Residential Mortgage Backed Securities [Member] Residential mortgage-backed security (RMBS) RMBS Restricted Cash and Cash Equivalents Restricted cash Restricted cash (includes $45,657,164 and $65,357,993 from consolidated VIEs, respectively) Collateral Cash, Restricted Cash Restricted cash due to a first mortgage escrow requirement Restricted Stock [Member] Restricted common stock Retail Site [Member] Retail Retained Earnings (Accumulated Deficit) Accumulated deficit Accumulated Deficit Retained Earnings [Member] Revenue Recognition, Policy [Policy Text Block] Revenue Recognition Revolving Credit Facility [Member] Revolving credit facility Risk Level, Low [Member] Lower credit risk Risk Level, High [Member] Higher credit risk Sale of Stock, Price Per Share Value of common shares issued to the public (in dollars per share) Scenario, Unspecified [Domain] Schedule of Impaired Financing Receivable [Table] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of certain financial assets and financial liabilities measured at fair value on a recurring basis Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Schedule of borrowings under the company's repurchase agreements and credit facilities Schedule of Debt [Table Text Block] Schedule of Financing Receivables Past Due [Table] Schedule of Earnings Per Share Reconciliation [Table Text Block] Reconciliation of the numerator and denominator of the basic and diluted earnings per share computations Schedule of Available-for-sale Securities [Line Items] Available-for-sale securities Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Summary of the company's securities classified as available-for-sale Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits, by Title of Individual and by Type of Deferred Compensation [Table] Schedule of Extinguishment of Debt [Table Text Block] Schedule of face amount and gain on extinguishment of the company's CDO bonds repurchased by bond class Schedule of Dividends Payable [Table Text Block] Schedule of dividends declared by the Company Schedule of Held-to-maturity Securities [Line Items] Held-to-maturity securities Schedule of Related Party Transactions, by Related Party [Table] Schedule of Variable Interest Entities [Table Text Block] Summary of the company's variable interests in identified VIEs, of which the company is not the primary beneficiary Schedule of derivative financial instruments held by the company Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of Variable Interest Entities [Table] Schedule of the effect of the company's derivative financial instruments on the statements of operations Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Table Text Block] Secured Debt Collateralized debt obligations Collateralized debt obligations (includes $841,460,154 and $1,002,615,393 from consolidated VIEs, respectively) Debt, Carrying Value Selling, General and Administrative Expense Selling and administrative Share-based Compensation Stock-based compensation Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Deferred Compensation Share Price Share price of shares of common stock sold under public offering Award Type [Domain] Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Stock-Based Compensation Shares, Outstanding Balance (in shares) Balance (in shares) Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Standard & Poor's, AA Rating [Member] AA Standard & Poor's, CCC Rating [Member] CCC Standard & Poor's, AAA Rating [Member] AAA Standard & Poor's AAA rating Standard & Poor's, BB- Rating [Member] BB- Standard & Poor's, CCC- Rating [Member] CCC- Standard & Poor's CCC- rating Standard & Poor's, BB Rating [Member] BB State and Local Income Tax Expense (Benefit), Continuing Operations State taxes for the entity's taxable REIT subsidiaries Statement [Table] Scenario [Axis] Statement Statement [Line Items] CONSOLIDATED STATEMENT OF CHANGES IN EQUITY CONSOLIDATED STATEMENTS OF CASH FLOWS Equity Components [Axis] CONSOLIDATED BALANCE SHEETS CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Geographical [Axis] Stock Issued During Period, Shares, Period Increase (Decrease) Stock Issued During Period, Shares, Issued for Services Common stock, shares issued as an incentive management fee (in shares) Common stock issued to entity Stock Repurchased and Retired During Period, Value Stock Repurchase Program, Number of Shares Authorized to be Repurchased Number of shares of common stock authorized to be repurchased under the stock repurchase program Stock Issued During Period, Shares, Conversion of Units Private equity offering, common stock shares sold Stock Issued During Period, Value, New Issues Issuance of common stock Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Stock-based compensation (in shares) Stock Repurchased During Period, Value Purchase of treasury stock Stock Issued Issuance of common stock for management incentive fee Stock-based compensation Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Stock Issued During Period, Shares, New Issues Issuance of common stock (in shares) Number of shares of common stock sold under public offering Stock Repurchased During Period, Shares Purchase of treasury stock (in shares) Equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Total equity Balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Balance Stockholders' Equity Attributable to Parent [Abstract] Arbor Realty Trust, Inc. stockholders' equity: Stockholders' Equity Attributable to Parent Total Arbor Realty Trust, Inc. stockholders' equity Equity Stockholders' Equity Note Disclosure [Text Block] Equity Stockholders' Equity, Period Increase (Decrease) Supplemental Cash Flow Information [Abstract] Supplemental cash flow information: Title of Individual with Relationship to Entity [Domain] Loans transferred to real estate owned, net Transfer from Other Real Estate Transfer from Investments Investment transferred to real estate held-for-sale, net Treasury Stock, Value Treasury stock, at cost - 2,650,767 shares at September 30, 2012 and 2,480,597 shares at December 31, 2011 Treasury Stock, Shares, Acquired Number of shares repurchased Treasury Stock Acquired, Average Cost Per Share Average cost (in dollars per share) Treasury Stock, Shares Treasury stock, shares (in shares) Treasury Stock Treasury Stock [Member] Treasury Stock, Value, Acquired, Cost Method Total cost of shares repurchased Troubled Debt Restructurings on Financing Receivables [Table Text Block] Summary of loan modifications and extensions by asset class that the entity considered to be troubled debt restructurings by asset class Valuation Technique [Axis] Valuation Technique [Domain] Consolidated VIEs Variable Interest Entity, Primary Beneficiary [Member] Variable Interest Entity [Line Items] Variable Interest Entities Variable Interest Entity, Not Primary Beneficiary [Member] Unconsolidated VIEs Variable Interest Entities [Axis] Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets Carrying Amount Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted average number of shares of common stock outstanding: Weighted Average [Member] Weighted average Weighted Average Weighted Average Number of Shares Outstanding, Basic Basic (in shares) Weighted average number of common shares outstanding Weighted Average Number of Shares Outstanding, Diluted Diluted (in shares) Weighted average number of common shares outstanding Net changes in fair value Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease) Net recoveries of previously recorded loan loss reserves Reflects the net recoveries of previously recorded bad debt expense. Net Recoveries of Bad Debt Expense Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Paydowns Proceeds from collateralized loan obligation Proceeds from collateralized loan obligation Proceeds from Issuance of Secured Loan The cash inflow from amounts received from issuance of long-term debt that is wholly or partially secured by collateral.