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Valuation (Schedule of Financial Instruments) (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value $ 1,875,929  
Investment in unconsolidated entities, at fair value [1] 70,435  
Financial derivatives–assets, at fair value- 12,740 $ 20,001
Repurchase agreements, at fair value 36,473 61,274
Investments sold short, at fair value- (36,909) (850,577)
Financial derivatives–liabilities, at fair value- (25,572) (20,806)
Other secured borrowings, at fair value (438,629) [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 70,435  
Total assets 3,184,947 3,020,586
Other secured borrowings, at fair value (438,629)  
Total liabilities (501,110) (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- (473)  
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- (36,436) (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- (11,185) (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- (186) (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- (194) (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- (12,115) (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- (904)  
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- (67) (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-   (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- (921) (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 1,565,007  
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 157,214  
Fair Value, Measurements, Recurring | Securities | CMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 39,574  
Fair Value, Measurements, Recurring | Securities | CLOs    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities, at fair value 67,400  
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 39,316  
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 3,182  
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 4,236  
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 797,728  
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 260,626  
Fair Value, Measurements, Recurring | Loans | Consumer loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, at fair value 151,699  
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 15,790  
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- 1,078 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- 5,060 733
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- 41 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- 2,146 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- 3,440 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- 142  
Fair Value, Measurements, Recurring | Financial Derivatives - Assets | Futures    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 484  
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- 114 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- 235 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 2,442 2,200
Other secured borrowings, at fair value 0  
Total liabilities (67) (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- (67) (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
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 1,958  
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 | Futures    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 484  
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 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 1,694,781 1,892,308
Other secured borrowings, at fair value 0  
Total liabilities (62,200) (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- (473)  
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- (36,436) (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- (11,185) (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- (186) (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- (194) (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- (12,115) (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- (904)  
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-   (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- (707) (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 1,541,508  
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 75,732  
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 27,206  
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 39,392  
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- 5,060 733
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- 41 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- 2,146 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- 3,440 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- 142  
Fair Value, Measurements, Recurring | Level 2 | Financial Derivatives - Assets | Futures    
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 2 | Financial Derivatives - Assets | Forwards    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial derivatives–assets, at fair value- 114 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 70,435  
Total assets 1,487,724 1,126,078
Other secured borrowings, at fair value (438,629)  
Total liabilities (438,843) (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
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- (214) 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 23,499  
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 81,482  
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 12,368  
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 28,008  
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 39,316  
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 3,182  
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 2,278  
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 797,728  
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 260,626  
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 151,699  
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 15,790  
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- 1,078 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 | Futures    
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 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- $ 235 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.