Use of Special Purpose Entities and Variable Interest Entities - Narrative (Details) $ in Thousands			3 Months Ended		6 Months Ended
		May 16, 2016	Jun. 30, 2016 USD ($) securitization property		Jun. 30, 2016 USD ($) securitization property		Dec. 31, 2015 USD ($) securitization
Variable Interest Entity [Line Items]
Securitized debt			$ 244,016		$ 244,016		$ 116,541
Unconsolidated VIE, maximum loss exposure			151,400		$ 151,400		170,700
Minimum
Variable Interest Entity [Line Items]
Repurchase agreements, expiration period					12 months
Maximum
Variable Interest Entity [Line Items]
Repurchase agreements, expiration period					15 months
Collateralized Recourse Financing
Variable Interest Entity [Line Items]
Securitized debt	[1],[2]		$ 55,751	[3]	$ 55,751	[3]	55,629	[4]
Repurchase agreements, expiration period			3 years
Distressed Residential Mortgage Loan Securitization
Variable Interest Entity [Line Items]
Securitized debt	[1],[5]		$ 160,304	[6]	$ 160,304	[6]	$ 33,299	[7]
Distressed Residential Mortgage Loan Securitization | Minimum
Variable Interest Entity [Line Items]
Number of real estate properties | property			1		1
Distressed Residential Mortgage Loan Securitization | Maximum
Variable Interest Entity [Line Items]
Number of real estate properties | property			4		4
Residential mortgage loans held in securitization trusts
Variable Interest Entity [Line Items]
Number of securitizations completed to date | securitization			4		4
Number of securitizations, consolidated, accounted for as permanent financing | securitization			3		3
K-Series | Consolidated K-Series
Variable Interest Entity [Line Items]
Number of securitizations | securitization			5		5		5
K-Series | Collateralized Recourse Financing
Variable Interest Entity [Line Items]
Number of securitizations | securitization			3		3		3
K-Series | Non-Financings, Multi-Family CMBS
Variable Interest Entity [Line Items]
Number of securitizations, non-financing VIE's | securitization			1		1		1
Distressed residential mortgage loans held in securitization trust, (net)
Variable Interest Entity [Line Items]
Residential mortgage loans held in securitization trusts (net), carrying value	[6]		$ 225,370		$ 225,370
Distressed residential mortgage loans held in securitization trust, (net) | Distressed Residential Mortgage Loan Securitization
Variable Interest Entity [Line Items]
Residential mortgage loans held in securitization trusts (net), carrying value	[7]						$ 114,214
RBDHC
Variable Interest Entity [Line Items]
Subsidiary cumulative percentage ownership after all transactions		100.00%
RBDHC | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Noncontrolling interest, ownership by parent, percentage		50.00%

[1] Classified as securitized debt in the liability section of the Company’s accompanying condensed consolidated balance sheets, net of debt issuance costs.

[2] The Company entered into a CMBS Master Repurchase Agreement with a three-year term for the purpose of financing a portion of its multi-family CMBS portfolio. In connection with the transaction, the Company agreed to guarantee the due and punctual payment of its wholly-owned subsidiary's obligations under the CMBS Master Repurchase Agreement.

[3] The multi-family CMBS serving as collateral under the November 2013 collateralized recourse financing are comprised of securities issued from three separate Freddie Mac-sponsored multi-family K-Series securitizations. The Financing VIE consolidated these K-Series securitizations, including their assets, liabilities, income and expenses, in its financial statements as based on a number of factors, the Company determined that it was the primary beneficiary and has a controlling financial interest in such K-Series securitizations (see Note 6). One of the Company’s Freddie Mac-sponsored multi-family K-Series securitizations included in the Consolidated K-Series is not subject to any financing as of June 30, 2016.

[4] The multi-family CMBS serving as collateral under the November 2013 collateralized recourse financing are comprised of securities issued from three separate Freddie Mac-sponsored multi-family K-Series securitizations. The Financing VIE consolidated these K-Series securitizations, including their assets, liabilities, income and expenses, in its financial statements as based on a number of factors, the Company determined that it was the primary beneficiary and has a controlling financial interest in such K-Series securitizations (see Note 6).

[5] .

[6] The Company engaged in these transactions for the purpose of financing distressed residential mortgage loans acquired by the Company. The distressed residential mortgage loans serving as collateral for the financings are comprised of performing, re-performing and, to a lesser extent, non-performing, fixed and adjustable-rate, fully-amortizing, interest only and balloon, seasoned mortgage loans secured by first liens on one to four family properties. Balances are related to a securitization transaction that closed in April 2016 that involved the issuance of $177.5 million of Class A Notes representing the beneficial ownership in a pool of performing and re-performing seasoned mortgage loans having an aggregate principal balance of approximately $282.8 million. The Company holds 5% of the Class A Notes issued as part of the securitization transaction. The Company has repaid the outstanding notes from its distressed residential mortgage loan securitizations completed in December 2012, July 2013 and September 2013 as of June 30, 2016. In connection with the repayment of the notes from the Company's distressed residential mortgage loan securitizations completed in December 2012, July 2013 and September 2013, the Company terminated and deconsolidated the Financing VIE that facilitated these financing transactions and the distressed residential loans serving as collateral on the notes were transferred back to the Company.

[7] {F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOjRiMjUzNWM4NTJjNTQ3Yzc5NWYzZGM3MjYxMDRlYzdjfFRleHRTZWxlY3Rpb246NjdEQTZBNjZDNTc5NUZEN0IwNTE2RUIxNjZCNTZBNjUM}