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Valuation (Schedule of Financial Instruments) (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value $ 1,668,677  
Investment in unconsolidated entities, at fair value [1] 69,676  
Financial derivatives–assets, at fair value- 11,150 $ 20,001
Repurchase agreements, at fair value 49,641 61,274
Investments sold short, at fair value- (49,583) (850,577)
Financial derivatives–liabilities, at fair value- (27,805) (20,806)
Other secured borrowings, at fair value (475,816) [1] (297,948)
Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment in unconsolidated entities, at fair value 69,676  
Total assets 2,841,026 3,020,586
Other secured borrowings, at fair value (475,816)  
Total liabilities (553,204) (1,169,331)
Fair Value, Measurements, Recurring | Investments Sold Short    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments sold short, at fair value-   (850,577)
Fair Value, Measurements, Recurring | Investments Sold Short | Agency RMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments sold short, at fair value-   (772,964)
Fair Value, Measurements, Recurring | Investments Sold Short | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments sold short, at fair value- (470)  
Fair Value, Measurements, Recurring | Investments Sold Short | Government debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments sold short, at fair value- (49,113) (54,151)
Fair Value, Measurements, Recurring | Investments Sold Short | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments sold short, at fair value-   (6,529)
Fair Value, Measurements, Recurring | Investments Sold Short | Common stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments sold short, at fair value-   (16,933)
Fair Value, Measurements, Recurring | Financial Derivatives - Liabilities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value-   (20,806)
Fair Value, Measurements, Recurring | Financial Derivatives - Liabilities | Credit default swaps on corporate bond indices    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- (14,113) (11,557)
Fair Value, Measurements, Recurring | Financial Derivatives - Liabilities | Credit default swaps on corporate bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- (686) (3,246)
Fair Value, Measurements, Recurring | Financial Derivatives - Liabilities | Credit default swaps on asset-backed indices    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- (202) (2,125)
Fair Value, Measurements, Recurring | Financial Derivatives - Liabilities | Interest rate swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- (7,658) (3,397)
Fair Value, Measurements, Recurring | Financial Derivatives - Liabilities | TBA securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- (2,443)  
Fair Value, Measurements, Recurring | Financial Derivatives - Liabilities | Futures    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- (2,380) (355)
Fair Value, Measurements, Recurring | Financial Derivatives - Liabilities | Forwards    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- (265) (120)
Fair Value, Measurements, Recurring | Financial Derivatives - Liabilities | Total return swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- (58) (6)
Fair Value, Measurements, Recurring | Other secured borrowings, at fair value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other secured borrowings, at fair value   (297,948)
Fair Value, Measurements, Recurring | Cash equivalents    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents   12,460
Fair Value, Measurements, Recurring | Securities | Agency RMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 1,338,901  
Fair Value, Measurements, Recurring | Securities | Non-Agency RMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 185,016  
Fair Value, Measurements, Recurring | Securities | CMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 37,658  
Fair Value, Measurements, Recurring | Securities | CLOs    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 76,211  
Fair Value, Measurements, Recurring | Securities | Asset-backed securities, backed by consumer loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 25,019  
Fair Value, Measurements, Recurring | Securities | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 4,081  
Fair Value, Measurements, Recurring | Securities | Corporate equity securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 1,791  
Fair Value, Measurements, Recurring | Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   2,939,311
Fair Value, Measurements, Recurring | Investments | Agency RMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   1,450,217
Fair Value, Measurements, Recurring | Investments | Non-Agency RMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   302,639
Fair Value, Measurements, Recurring | Investments | CMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   33,908
Fair Value, Measurements, Recurring | Investments | CLOs    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   123,893
Fair Value, Measurements, Recurring | Investments | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   22,392
Fair Value, Measurements, Recurring | Investments | Corporate equity securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   43,793
Fair Value, Measurements, Recurring | Investments | Secured notes    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   10,917
Fair Value, Measurements, Recurring | Investments | U.S. Treasury securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   76
Fair Value, Measurements, Recurring | Investments | Residential mortgage loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   496,830
Fair Value, Measurements, Recurring | Investments | Commercial mortgage loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   211,185
Fair Value, Measurements, Recurring | Investments | Consumer loans and asset-backed securities backed by consumer loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   206,761
Fair Value, Measurements, Recurring | Investments | Real estate owned    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   34,500
Fair Value, Measurements, Recurring | Investments | Common stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   2,200
Fair Value, Measurements, Recurring | Loans | Residential mortgage loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, at fair value 663,880  
Fair Value, Measurements, Recurring | Loans | Commercial mortgage loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, at fair value 260,034  
Fair Value, Measurements, Recurring | Loans | Consumer loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, at fair value 162,609  
Fair Value, Measurements, Recurring | Loans | Corporate loan [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, at fair value 5,000  
Fair Value, Measurements, Recurring | Financial Derivatives - Assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value-   20,001
Fair Value, Measurements, Recurring | Financial Derivatives - Assets | Credit default swaps on asset-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 1,090 1,472
Fair Value, Measurements, Recurring | Financial Derivatives - Assets | Credit default swaps on corporate bond indices    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 5,714 733
Fair Value, Measurements, Recurring | Financial Derivatives - Assets | Credit default swaps on corporate bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 521 2,473
Fair Value, Measurements, Recurring | Financial Derivatives - Assets | Credit default swaps on asset-backed indices    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 2,164 8,092
Fair Value, Measurements, Recurring | Financial Derivatives - Assets | Interest rate swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 1,434 7,224
Fair Value, Measurements, Recurring | Financial Derivatives - Assets | TBA securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 140  
Fair Value, Measurements, Recurring | Financial Derivatives - Assets | Forwards    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value-   6
Fair Value, Measurements, Recurring | Financial Derivatives - Assets | Total return swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 87 1
Fair Value, Measurements, Recurring | Repurchase Agreements    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Repurchase agreements, at fair value   61,274
Fair Value, Measurements, Recurring | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment in unconsolidated entities, at fair value 0  
Total assets 0 2,200
Other secured borrowings, at fair value 0  
Total liabilities (2,380) (17,288)
Fair Value, Measurements, Recurring | Level 1 | Investments Sold Short    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments sold short, at fair value-   (16,933)
Fair Value, Measurements, Recurring | Level 1 | Investments Sold Short | Agency RMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments sold short, at fair value-   0
Fair Value, Measurements, Recurring | Level 1 | Investments Sold Short | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments sold short, at fair value- 0  
Fair Value, Measurements, Recurring | Level 1 | Investments Sold Short | Government debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments sold short, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 1 | Investments Sold Short | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments sold short, at fair value-   0
Fair Value, Measurements, Recurring | Level 1 | Investments Sold Short | Common stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments sold short, at fair value-   (16,933)
Fair Value, Measurements, Recurring | Level 1 | Financial Derivatives - Liabilities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value-   (355)
Fair Value, Measurements, Recurring | Level 1 | Financial Derivatives - Liabilities | Credit default swaps on corporate bond indices    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 1 | Financial Derivatives - Liabilities | Credit default swaps on corporate bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 1 | Financial Derivatives - Liabilities | Credit default swaps on asset-backed indices    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 1 | Financial Derivatives - Liabilities | Interest rate swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 1 | Financial Derivatives - Liabilities | TBA securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- 0  
Fair Value, Measurements, Recurring | Level 1 | Financial Derivatives - Liabilities | Futures    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- (2,380) (355)
Fair Value, Measurements, Recurring | Level 1 | Financial Derivatives - Liabilities | Forwards    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 1 | Financial Derivatives - Liabilities | Total return swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 1 | Other secured borrowings, at fair value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other secured borrowings, at fair value   0
Fair Value, Measurements, Recurring | Level 1 | Cash equivalents    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents   12,460
Fair Value, Measurements, Recurring | Level 1 | Securities | Agency RMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 0  
Fair Value, Measurements, Recurring | Level 1 | Securities | Non-Agency RMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 0  
Fair Value, Measurements, Recurring | Level 1 | Securities | CMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 0  
Fair Value, Measurements, Recurring | Level 1 | Securities | CLOs    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 0  
Fair Value, Measurements, Recurring | Level 1 | Securities | Asset-backed securities, backed by consumer loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 0  
Fair Value, Measurements, Recurring | Level 1 | Securities | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 0  
Fair Value, Measurements, Recurring | Level 1 | Securities | Corporate equity securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 0  
Fair Value, Measurements, Recurring | Level 1 | Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   2,200
Fair Value, Measurements, Recurring | Level 1 | Investments | Agency RMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   0
Fair Value, Measurements, Recurring | Level 1 | Investments | Non-Agency RMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   0
Fair Value, Measurements, Recurring | Level 1 | Investments | CMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   0
Fair Value, Measurements, Recurring | Level 1 | Investments | CLOs    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   0
Fair Value, Measurements, Recurring | Level 1 | Investments | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   0
Fair Value, Measurements, Recurring | Level 1 | Investments | Corporate equity securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   0
Fair Value, Measurements, Recurring | Level 1 | Investments | Secured notes    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   0
Fair Value, Measurements, Recurring | Level 1 | Investments | U.S. Treasury securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   0
Fair Value, Measurements, Recurring | Level 1 | Investments | Residential mortgage loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   0
Fair Value, Measurements, Recurring | Level 1 | Investments | Commercial mortgage loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   0
Fair Value, Measurements, Recurring | Level 1 | Investments | Consumer loans and asset-backed securities backed by consumer loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   0
Fair Value, Measurements, Recurring | Level 1 | Investments | Real estate owned    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   0
Fair Value, Measurements, Recurring | Level 1 | Investments | Common stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   2,200
Fair Value, Measurements, Recurring | Level 1 | Loans | Residential mortgage loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, at fair value 0  
Fair Value, Measurements, Recurring | Level 1 | Loans | Commercial mortgage loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, at fair value 0  
Fair Value, Measurements, Recurring | Level 1 | Loans | Consumer loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, at fair value 0  
Fair Value, Measurements, Recurring | Level 1 | Loans | Corporate loan [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, at fair value 0  
Fair Value, Measurements, Recurring | Level 1 | Financial Derivatives - Assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value-   0
Fair Value, Measurements, Recurring | Level 1 | Financial Derivatives - Assets | Credit default swaps on asset-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 1 | Financial Derivatives - Assets | Credit default swaps on corporate bond indices    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 1 | Financial Derivatives - Assets | Credit default swaps on corporate bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 1 | Financial Derivatives - Assets | Credit default swaps on asset-backed indices    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 1 | Financial Derivatives - Assets | Interest rate swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 1 | Financial Derivatives - Assets | TBA securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 0  
Fair Value, Measurements, Recurring | Level 1 | Financial Derivatives - Assets | Forwards    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value-   0
Fair Value, Measurements, Recurring | Level 1 | Financial Derivatives - Assets | Total return swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 1 | Repurchase Agreements    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Repurchase agreements, at fair value   0
Fair Value, Measurements, Recurring | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment in unconsolidated entities, at fair value 0  
Total assets 1,516,435 1,892,308
Other secured borrowings, at fair value 0  
Total liabilities (75,008) (854,095)
Fair Value, Measurements, Recurring | Level 2 | Investments Sold Short    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments sold short, at fair value-   (833,644)
Fair Value, Measurements, Recurring | Level 2 | Investments Sold Short | Agency RMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments sold short, at fair value-   (772,964)
Fair Value, Measurements, Recurring | Level 2 | Investments Sold Short | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments sold short, at fair value- (470)  
Fair Value, Measurements, Recurring | Level 2 | Investments Sold Short | Government debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments sold short, at fair value- (49,113) (54,151)
Fair Value, Measurements, Recurring | Level 2 | Investments Sold Short | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments sold short, at fair value-   (6,529)
Fair Value, Measurements, Recurring | Level 2 | Investments Sold Short | Common stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments sold short, at fair value-   0
Fair Value, Measurements, Recurring | Level 2 | Financial Derivatives - Liabilities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value-   (20,451)
Fair Value, Measurements, Recurring | Level 2 | Financial Derivatives - Liabilities | Credit default swaps on corporate bond indices    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- (14,113) (11,557)
Fair Value, Measurements, Recurring | Level 2 | Financial Derivatives - Liabilities | Credit default swaps on corporate bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- (686) (3,246)
Fair Value, Measurements, Recurring | Level 2 | Financial Derivatives - Liabilities | Credit default swaps on asset-backed indices    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- (202) (2,125)
Fair Value, Measurements, Recurring | Level 2 | Financial Derivatives - Liabilities | Interest rate swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- (7,658) (3,397)
Fair Value, Measurements, Recurring | Level 2 | Financial Derivatives - Liabilities | TBA securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- (2,443)  
Fair Value, Measurements, Recurring | Level 2 | Financial Derivatives - Liabilities | Futures    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 2 | Financial Derivatives - Liabilities | Forwards    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- (265) (120)
Fair Value, Measurements, Recurring | Level 2 | Financial Derivatives - Liabilities | Total return swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- (58) (6)
Fair Value, Measurements, Recurring | Level 2 | Other secured borrowings, at fair value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other secured borrowings, at fair value   0
Fair Value, Measurements, Recurring | Level 2 | Cash equivalents    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents   0
Fair Value, Measurements, Recurring | Level 2 | Securities | Agency RMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 1,327,867  
Fair Value, Measurements, Recurring | Level 2 | Securities | Non-Agency RMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 88,226  
Fair Value, Measurements, Recurring | Level 2 | Securities | CMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 31,380  
Fair Value, Measurements, Recurring | Level 2 | Securities | CLOs    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 58,989  
Fair Value, Measurements, Recurring | Level 2 | Securities | Asset-backed securities, backed by consumer loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 0  
Fair Value, Measurements, Recurring | Level 2 | Securities | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 0  
Fair Value, Measurements, Recurring | Level 2 | Securities | Corporate equity securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 0  
Fair Value, Measurements, Recurring | Level 2 | Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   1,812,505
Fair Value, Measurements, Recurring | Level 2 | Investments | Agency RMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   1,442,924
Fair Value, Measurements, Recurring | Level 2 | Investments | Non-Agency RMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   211,348
Fair Value, Measurements, Recurring | Level 2 | Investments | CMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   33,105
Fair Value, Measurements, Recurring | Level 2 | Investments | CLOs    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   108,978
Fair Value, Measurements, Recurring | Level 2 | Investments | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   16,074
Fair Value, Measurements, Recurring | Level 2 | Investments | Corporate equity securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   0
Fair Value, Measurements, Recurring | Level 2 | Investments | Secured notes    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   0
Fair Value, Measurements, Recurring | Level 2 | Investments | U.S. Treasury securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   76
Fair Value, Measurements, Recurring | Level 2 | Investments | Residential mortgage loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   0
Fair Value, Measurements, Recurring | Level 2 | Investments | Commercial mortgage loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   0
Fair Value, Measurements, Recurring | Level 2 | Investments | Consumer loans and asset-backed securities backed by consumer loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   0
Fair Value, Measurements, Recurring | Level 2 | Investments | Real estate owned    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   0
Fair Value, Measurements, Recurring | Level 2 | Investments | Common stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   0
Fair Value, Measurements, Recurring | Level 2 | Loans | Residential mortgage loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, at fair value 0  
Fair Value, Measurements, Recurring | Level 2 | Loans | Commercial mortgage loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, at fair value 0  
Fair Value, Measurements, Recurring | Level 2 | Loans | Consumer loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, at fair value 0  
Fair Value, Measurements, Recurring | Level 2 | Loans | Corporate loan [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, at fair value 0  
Fair Value, Measurements, Recurring | Level 2 | Financial Derivatives - Assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value-   18,529
Fair Value, Measurements, Recurring | Level 2 | Financial Derivatives - Assets | Credit default swaps on asset-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 2 | Financial Derivatives - Assets | Credit default swaps on corporate bond indices    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 5,714 733
Fair Value, Measurements, Recurring | Level 2 | Financial Derivatives - Assets | Credit default swaps on corporate bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 521 2,473
Fair Value, Measurements, Recurring | Level 2 | Financial Derivatives - Assets | Credit default swaps on asset-backed indices    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 2,164 8,092
Fair Value, Measurements, Recurring | Level 2 | Financial Derivatives - Assets | Interest rate swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 1,434 7,224
Fair Value, Measurements, Recurring | Level 2 | Financial Derivatives - Assets | TBA securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 140  
Fair Value, Measurements, Recurring | Level 2 | Financial Derivatives - Assets | Forwards    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value-   6
Fair Value, Measurements, Recurring | Level 2 | Financial Derivatives - Assets | Total return swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 0 1
Fair Value, Measurements, Recurring | Level 2 | Repurchase Agreements    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Repurchase agreements, at fair value   61,274
Fair Value, Measurements, Recurring | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment in unconsolidated entities, at fair value 69,676  
Total assets 1,324,591 1,126,078
Other secured borrowings, at fair value (475,816)  
Total liabilities (475,816) (297,948)
Fair Value, Measurements, Recurring | Level 3 | Investments Sold Short    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments sold short, at fair value-   0
Fair Value, Measurements, Recurring | Level 3 | Investments Sold Short | Agency RMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments sold short, at fair value-   0
Fair Value, Measurements, Recurring | Level 3 | Investments Sold Short | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments sold short, at fair value- 0  
Fair Value, Measurements, Recurring | Level 3 | Investments Sold Short | Government debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments sold short, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 3 | Investments Sold Short | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments sold short, at fair value-   0
Fair Value, Measurements, Recurring | Level 3 | Investments Sold Short | Common stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments sold short, at fair value-   0
Fair Value, Measurements, Recurring | Level 3 | Financial Derivatives - Liabilities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value-   0
Fair Value, Measurements, Recurring | Level 3 | Financial Derivatives - Liabilities | Credit default swaps on corporate bond indices    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 3 | Financial Derivatives - Liabilities | Credit default swaps on corporate bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 3 | Financial Derivatives - Liabilities | Credit default swaps on asset-backed indices    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 3 | Financial Derivatives - Liabilities | Interest rate swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 3 | Financial Derivatives - Liabilities | TBA securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- 0  
Fair Value, Measurements, Recurring | Level 3 | Financial Derivatives - Liabilities | Futures    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 3 | Financial Derivatives - Liabilities | Forwards    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 3 | Financial Derivatives - Liabilities | Total return swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–liabilities, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 3 | Other secured borrowings, at fair value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other secured borrowings, at fair value   (297,948)
Fair Value, Measurements, Recurring | Level 3 | Cash equivalents    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents   0
Fair Value, Measurements, Recurring | Level 3 | Securities | Agency RMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 11,034  
Fair Value, Measurements, Recurring | Level 3 | Securities | Non-Agency RMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 96,790  
Fair Value, Measurements, Recurring | Level 3 | Securities | CMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 6,278  
Fair Value, Measurements, Recurring | Level 3 | Securities | CLOs    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 17,222  
Fair Value, Measurements, Recurring | Level 3 | Securities | Asset-backed securities, backed by consumer loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 25,019  
Fair Value, Measurements, Recurring | Level 3 | Securities | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 4,081  
Fair Value, Measurements, Recurring | Level 3 | Securities | Corporate equity securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 1,791  
Fair Value, Measurements, Recurring | Level 3 | Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   1,124,606
Fair Value, Measurements, Recurring | Level 3 | Investments | Agency RMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   7,293
Fair Value, Measurements, Recurring | Level 3 | Investments | Non-Agency RMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   91,291
Fair Value, Measurements, Recurring | Level 3 | Investments | CMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   803
Fair Value, Measurements, Recurring | Level 3 | Investments | CLOs    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   14,915
Fair Value, Measurements, Recurring | Level 3 | Investments | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   6,318
Fair Value, Measurements, Recurring | Level 3 | Investments | Corporate equity securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   43,793
Fair Value, Measurements, Recurring | Level 3 | Investments | Secured notes    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   10,917
Fair Value, Measurements, Recurring | Level 3 | Investments | U.S. Treasury securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   0
Fair Value, Measurements, Recurring | Level 3 | Investments | Residential mortgage loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   496,830
Fair Value, Measurements, Recurring | Level 3 | Investments | Commercial mortgage loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   211,185
Fair Value, Measurements, Recurring | Level 3 | Investments | Consumer loans and asset-backed securities backed by consumer loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   206,761
Fair Value, Measurements, Recurring | Level 3 | Investments | Real estate owned    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   34,500
Fair Value, Measurements, Recurring | Level 3 | Investments | Common stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, at fair value-   0
Fair Value, Measurements, Recurring | Level 3 | Loans | Residential mortgage loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, at fair value 663,880  
Fair Value, Measurements, Recurring | Level 3 | Loans | Commercial mortgage loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, at fair value 260,034  
Fair Value, Measurements, Recurring | Level 3 | Loans | Consumer loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, at fair value 162,609  
Fair Value, Measurements, Recurring | Level 3 | Loans | Corporate loan [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, at fair value 5,000  
Fair Value, Measurements, Recurring | Level 3 | Financial Derivatives - Assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value-   1,472
Fair Value, Measurements, Recurring | Level 3 | Financial Derivatives - Assets | Credit default swaps on asset-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 1,090 1,472
Fair Value, Measurements, Recurring | Level 3 | Financial Derivatives - Assets | Credit default swaps on corporate bond indices    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 3 | Financial Derivatives - Assets | Credit default swaps on corporate bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 3 | Financial Derivatives - Assets | Credit default swaps on asset-backed indices    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 3 | Financial Derivatives - Assets | Interest rate swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 0 0
Fair Value, Measurements, Recurring | Level 3 | Financial Derivatives - Assets | TBA securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 0  
Fair Value, Measurements, Recurring | Level 3 | Financial Derivatives - Assets | Forwards    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value-   0
Fair Value, Measurements, Recurring | Level 3 | Financial Derivatives - Assets | Total return swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- $ 87 0
Fair Value, Measurements, Recurring | Level 3 | Repurchase Agreements    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Repurchase agreements, at fair value   $ 0
[1] Ellington Financial Inc.'s Condensed Consolidated Balance Sheet includes assets and liabilities of variable interest entities it has consolidated. See Note 9 for additional details on Ellington Financial Inc.'s consolidated variable interest entities.