Subsequent Events	12 Months Ended
Dec. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Merger agreement. As previously disclosed in a Form 8-K filed with the SEC on February 26, 2016 (the “Merger 8-K”), we recently entered into an Agreement and Plan of Merger (the “Merger Agreement”), dated February 26, 2016, with Apollo Residential Mortgage, Inc., a Maryland corporation (“AMTG”), and Arrow Merger Sub, Inc., a Maryland corporation and a wholly-owned subsidiary of the Company (the “Merger Sub”), pursuant to which the Company will acquire AMTG for an aggregate purchase price equal to 89.25% of AMTG’s book value as of a future determination date, plus the assumption of $172,500 of AMTG’s 8.0% Series A Cumulative Redeemable Perpetual Preferred Stock (the “AMTG Preferred Stock”). The book value of AMTG, and therefore the actual purchase price payable, will be determined as of the date that is three business days prior to the date on which the definitive proxy statement relating to the merger transaction is mailed to the stockholders of AMTG (the “Pricing Date”), and will be subject to adjustment under certain circumstances. Upon the closing, holders of AMTG common stock will receive a combination of cash and shares of Company common stock. The aggregate number of shares of Company common stock issuable under the Merger Agreement is limited to 13,400,000 shares at a value of $16.75 per share, and the remainder of the consideration will be paid in cash. In addition, each share of AMTG Preferred Stock will be converted into one share of preferred stock, par value $0.01 per share, of a newly-designated series of the Company’s preferred stock, which the Company expects will be designated as 8.00% Series C Cumulative Redeemable Perpetual Preferred Stock. The Merger Agreement and related transactions were approved by all of the members of our Board of Directors (with the exception of Mark Biderman, who recused himself). Consummation of the merger transaction is subject to the satisfaction of customary closing conditions, including the registration and listing of the shares of ARI stock that will be issued in the merger transaction and the approval and adoption of the Merger Agreement by the holders of a majority of the shares of AMTG common stock entitled to vote on the transaction, including a majority of the votes entitled to be cast by persons unaffiliated with Apollo Global Management, LLC. Company stockholder approval will not be required in connection with the transaction. Arrangements with Athene. In connection with financing the transactions contemplated by the Merger Agreement, on February 26, 2016 the Company entered into certain arrangements with certain subsidiaries of Athene Holding Ltd., an insurance holding company whose operating subsidiaries’ business is primarily issuing and reinsuring retirement savings products (collectively, “Athene”). The arrangements include (i) a bridge loan commitment from Athene USA Corporation, pursuant to which Athene has committed to provide the Company with up to $200,000 of term loans to consummate the merger transaction, (ii) an asset purchase agreement which provides that, promptly following the closing of the merger transaction, the Company will sell to Athene up to approximately $1,200,000 (subject to increase or decrease in certain circumstances) of primarily non-Agency Residential Mortgage Backed Securities at a price to be set (based on a pre-agreed methodology) as of the Pricing Date, and (iii) a stock purchase agreement, under which Athene has committed to purchase, during a specified period of time following the closing of the merger transaction, up to $20,000 (subject to reduction in certain circumstances) of Company common stock in the open market at the then-current market price if the quoted price of a share of Company common stock on the New York Stock Exchange at any time during such period is less than $16.75 (which is the value per share at which the Company common stock is to be issued to holders of AMTG common stock in the merger). Letter Agreement with the Manager. Concurrently with the execution of the Merger Agreement, the Company entered into a Letter Agreement with the Manager, pursuant to which the Manager has agreed to perform such services and activities as may be necessary to enable the Company to consummate the merger transaction. In consideration of the services provided and to be provided to the Company by the Manager in connection with the merger transaction and the process leading to the merger transaction, the Company agreed to pay the Manager an aggregate amount of up to $500, in monthly installments of $150 payable on the first of each calendar month between the execution of the Merger Agreement and the closing of the merger transaction. Upon consummation of the merger transaction, an additional amount (based on an agreed formula) will be added to Stockholders’ Equity (as defined in the Management Agreement) for purposes of calculating the amount of the management fee payable to the Manager under the Management Agreement. In addition, the Manager acknowledged that, as a result of the merger transaction, the management agreement between AMTG and its manager, ARM Manager, LLC (the “AMTG Management Agreement”), will be assigned to the Company and, following the merger transaction, any management fees paid by the Company to ARM Manager, LLC pursuant to the AMTG Management Agreement will offset, and therefore reduce (but not below zero), the Company’s obligation to pay corresponding management fees to the Manager. For additional details regarding the terms and conditions of the Merger Agreement, the arrangements with Athene and related matters, refer to the Merger 8-K and to the Merger Agreement and other documentation filed as exhibits thereto. Additional information regarding the proposed transaction, including risks associated with the proposed transaction, will be contained in a definitive proxy statement/prospectus to be filed by the Company and AMTG with the SEC. Investment activity. During January 2016, the Company closed a $220,000 first mortgage loan, $177,500 of which was funded, secured by an assemblage of 16 existing retail and office properties for redevelopment located in the Design District neighborhood of Miami, Florida. A portion of the first funding of the loan was used to refinance a $33,000 first mortgage loan the Company originated to the borrower in June 2015, and for the acquisition of two additional parcels. The floating-rate loan has a two-year initial term with a one-year extension option followed by a six-month extension option. The first mortgage loan has a loan-to-cost of 65%. During February 2016, the Company closed a $77,000 mezzanine loan, $21,888 of which was funded at closing, for the redevelopment and conversion of an existing commercial property into 139 luxury condominiums located in the Tribeca neighborhood of New York City. The floating-rate loan has a 42-month initial term with a one-year extension option followed by a six-month extension option and is part of a $411,000 financing consisting of a $334,000 first mortgage loan and the Company’s $77,000 mezzanine loan. The mezzanine loan has an appraised loan-to-net sellout of 57%. Management Agreement. Following a meeting by the Company’s independent directors in February 2016, which included a discussion of the Manager’s performance and the level of the management fees thereunder, the Company determined not to terminate the Management Agreement.

Subsequent Events

Merger agreement. As previously disclosed in a Form 8-K filed with the SEC on February 26, 2016 (the “Merger 8-K”), we recently entered into an Agreement and Plan of Merger (the “Merger Agreement”), dated February 26, 2016, with Apollo Residential Mortgage, Inc., a Maryland corporation (“AMTG”), and Arrow Merger Sub, Inc., a Maryland corporation and a wholly-owned subsidiary of the Company (the “Merger Sub”), pursuant to which the Company will acquire AMTG for an aggregate purchase price equal to 89.25% of AMTG’s book value as of a future determination date, plus the assumption of $172,500 of AMTG’s 8.0% Series A Cumulative Redeemable Perpetual Preferred Stock (the “AMTG Preferred Stock”). The book value of AMTG, and therefore the actual purchase price payable, will be determined as of the date that is three business days prior to the date on which the definitive proxy statement relating to the merger transaction is mailed to the stockholders of AMTG (the “Pricing Date”), and will be subject to adjustment under certain circumstances. Upon the closing, holders of AMTG common stock will receive a combination of cash and shares of Company common stock. The aggregate number of shares of Company common stock issuable under the Merger Agreement is limited to 13,400,000 shares at a value of $16.75 per share, and the remainder of the consideration will be paid in cash. In addition, each share of AMTG Preferred Stock will be converted into one share of preferred stock, par value $0.01 per share, of a newly-designated series of the Company’s preferred stock, which the Company expects will be designated as 8.00% Series C Cumulative Redeemable Perpetual Preferred Stock.

The Merger Agreement and related transactions were approved by all of the members of our Board of Directors (with the exception of Mark Biderman, who recused himself). Consummation of the merger transaction is subject to the satisfaction of customary closing conditions, including the registration and listing of the shares of ARI stock that will be issued in the merger transaction and the approval and adoption of the Merger Agreement by the holders of a majority of the shares of AMTG common stock entitled to vote on the transaction, including a majority of the votes entitled to be cast by persons unaffiliated with Apollo Global Management, LLC. Company stockholder approval will not be required in connection with the transaction.

Arrangements with Athene. In connection with financing the transactions contemplated by the Merger Agreement, on February 26, 2016 the Company entered into certain arrangements with certain subsidiaries of Athene Holding Ltd., an insurance holding company whose operating subsidiaries’ business is primarily issuing and reinsuring retirement savings products (collectively, “Athene”). The arrangements include (i) a bridge loan commitment from Athene USA Corporation, pursuant to which Athene has committed to provide the Company with up to $200,000 of term loans to consummate the merger transaction, (ii) an asset purchase agreement which provides that, promptly following the closing of the merger transaction, the Company will sell to Athene up to approximately $1,200,000 (subject to increase or decrease in certain circumstances) of primarily non-Agency Residential Mortgage Backed Securities at a price to be set (based on a pre-agreed methodology) as of the Pricing Date, and (iii) a stock purchase agreement, under which Athene has committed to purchase, during a specified period of time following the closing of the merger transaction, up to $20,000 (subject to reduction in certain circumstances) of Company common stock in the open market at the then-current market price if the quoted price of a share of Company common stock on the New York Stock Exchange at any time during such period is less than $16.75 (which is the value per share at which the Company common stock is to be issued to holders of AMTG common stock in the merger).

Letter Agreement with the Manager. Concurrently with the execution of the Merger Agreement, the Company entered into a Letter Agreement with the Manager, pursuant to which the Manager has agreed to perform such services and activities as may be necessary to enable the Company to consummate the merger transaction. In consideration of the services provided and to be provided to the Company by the Manager in connection with the merger transaction and the process leading to the merger transaction, the Company agreed to pay the Manager an aggregate amount of up to $500, in monthly installments of $150 payable on the first of each calendar month between the execution of the Merger Agreement and the closing of the merger transaction. Upon consummation of the merger transaction, an additional amount (based on an agreed formula) will be added to Stockholders’ Equity (as defined in the Management Agreement) for purposes of calculating the amount of the management fee payable to the Manager under the Management Agreement. In addition, the Manager acknowledged that, as a result of the merger transaction, the management agreement between AMTG and its manager, ARM Manager, LLC (the “AMTG Management Agreement”), will be assigned to the Company and, following the merger transaction, any management fees paid by the Company to ARM Manager, LLC pursuant to the AMTG Management Agreement will offset, and therefore reduce (but not below zero), the Company’s obligation to pay corresponding management fees to the Manager.

For additional details regarding the terms and conditions of the Merger Agreement, the arrangements with Athene and related matters, refer to the Merger 8-K and to the Merger Agreement and other documentation filed as exhibits thereto. Additional information regarding the proposed transaction, including risks associated with the proposed transaction, will be contained in a definitive proxy statement/prospectus to be filed by the Company and AMTG with the SEC.

Investment activity. During January 2016, the Company closed a $220,000 first mortgage loan, $177,500 of which was funded, secured by an assemblage of 16 existing retail and office properties for redevelopment located in the Design District neighborhood of Miami, Florida. A portion of the first funding of the loan was used to refinance a $33,000 first mortgage loan the Company originated to the borrower in June 2015, and for the acquisition of two additional parcels. The floating-rate loan has a two-year initial term with a one-year extension option followed by a six-month extension option. The first mortgage loan has a loan-to-cost of 65%.

During February 2016, the Company closed a $77,000 mezzanine loan, $21,888 of which was funded at closing, for the redevelopment and conversion of an existing commercial property into 139 luxury condominiums located in the Tribeca neighborhood of New York City. The floating-rate loan has a 42-month initial term with a one-year extension option followed by a six-month extension option and is part of a $411,000 financing consisting of a $334,000 first mortgage loan and the Company’s $77,000 mezzanine loan. The mezzanine loan has an appraised loan-to-net sellout of 57%.

Management Agreement. Following a meeting by the Company’s independent directors in February 2016, which included a discussion of the Manager’s performance and the level of the management fees thereunder, the Company determined not to terminate the Management Agreement.