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Valuation (Schedule of Financial Instruments) (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Mar. 31, 2023
Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Securities, at fair value(1)(2) [1],[2]   $ 1,389,547 $ 1,459,465
Investment in unconsolidated entities, at fair value [1]   118,747 127,046
Financial derivatives–assets, at fair value-   104,033 132,518
Investments sold short, at fair value-   (158,302) (209,203)
Financial derivatives–liabilities, at fair value-   (24,245) (54,198)
Other secured borrowings, at fair value [1]   (1,534,592) (1,539,881)
Senior notes, at fair value   185,325 191,835
Servicing Asset at Fair Value, Amount   8,100 8,108
Loan commitments, at fair value $ 3,299 3,300 3,060
HMBS-related obligations, at fair value   (7,975,916) (7,787,155)
Level 3 | Non-Agency RMBS      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total assets   156,277 132,502
Level 3 | CMBS      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total assets   11,767 12,649
Level 3 | CLOs      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total assets   28,674 24,598
Fair Value, Measurements, Recurring      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total assets   13,436,592 13,357,204
Total liabilities   (9,878,380) (9,782,272)
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-   (158,302) (209,203)
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-   (1,720) (1,513)
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-   (277) (259)
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-   (33) (33)
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-   (13,211) (50,290)
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-   (5,623) (2,007)
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-   (3,076) (96)
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-   (305)  
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   (1,534,592) (1,539,881)
Senior notes, at fair value   185,325 191,835
HMBS-related obligations, at fair value   (7,975,916) (7,787,155)
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)(2)   853,112 968,263
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(1)(2)   264,944 262,178
Fair Value, Measurements, Recurring | Securities | CMBS      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Securities, at fair value(1)(2)   16,422 18,253
Fair Value, Measurements, Recurring | Securities | CLOs      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Securities, at fair value(1)(2)   32,168 31,061
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(1)(2)   72,200 73,644
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(1)(2)   8,347 7,533
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)(2)   11,102 11,111
Fair Value, Measurements, Recurring | Securities | U.S. Treasury securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Securities, at fair value(1)(2)   131,252 87,422
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   3,024,744 3,115,518
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   374,233 404,324
Fair Value, Measurements, Recurring | Loans | Consumer loans      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Loans, at fair value   3,969 4,843
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   4,920 4,086
Fair Value, Measurements, Recurring | Loans | Reverse mortgage loans      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Loans, at fair value   8,404,701 8,097,237
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-   76 76
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-   44 83
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-   4,846 3,366
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-   96,399 117,022
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-   1,524 7,985
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-   88 2,772
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-     77
Fair Value, Measurements, Recurring | Financial Derivatives - Assets | Warrants      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Financial derivatives–assets, at fair value-   1,056 1,137
Fair Value, Measurements, Recurring | Investment in unconsolidated entities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment in unconsolidated entities, at fair value   118,747 127,046
Servicing Asset at Fair Value, Amount   8,100 8,108
Servicing related asset   299 999
Loan commitments, at fair value   3,299 3,060
Fair Value, Measurements, Recurring | Level 1      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total assets   88 2,772
Total liabilities   (3,076) (96)
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 | 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 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-   (3,076) (96)
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 | 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 0
Senior notes, at fair value   0 0
HMBS-related obligations, at fair value   0 0
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(1)(2)   0 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(1)(2)   0 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(1)(2)   0 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(1)(2)   0 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(1)(2)   0 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(1)(2)   0 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)(2)   0 0
Fair Value, Measurements, Recurring | Level 1 | Securities | U.S. Treasury securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Securities, at fair value(1)(2)   0 0
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 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 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 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 0
Fair Value, Measurements, Recurring | Level 1 | Loans | Reverse mortgage loans      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Loans, at fair value   0 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 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 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-   88 2,772
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 | Warrants      
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 | Investment in unconsolidated entities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment in unconsolidated entities, at fair value   0 0
Servicing Asset at Fair Value, Amount   0 0
Servicing related asset   0 0
Loan commitments, at fair value   0 0
Fair Value, Measurements, Recurring | Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total assets   1,198,856 1,320,071
Total liabilities   (179,471) (263,305)
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-   (158,302) (209,203)
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-   (1,720) (1,513)
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-   (277) (259)
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-   (33) (33)
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-   (13,211) (50,290)
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-   (5,623) (2,007)
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-   (305)  
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 0
Senior notes, at fair value   0 0
HMBS-related obligations, at fair value   0 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)(2)   846,919 961,236
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(1)(2)   108,667 129,676
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(1)(2)   4,655 5,604
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(1)(2)   3,494 6,463
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(1)(2)   0 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(1)(2)   0 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(1)(2)   0 0
Fair Value, Measurements, Recurring | Level 2 | Securities | U.S. Treasury securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Securities, at fair value(1)(2)   131,252 87,422
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 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 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 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 0
Fair Value, Measurements, Recurring | Level 2 | Loans | Reverse mortgage loans      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Loans, at fair value   0 0
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-   44 83
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-   4,846 3,366
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-   96,399 117,022
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-   1,524 7,985
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 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-     77
Fair Value, Measurements, Recurring | Level 2 | Financial Derivatives - Assets | Warrants      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Financial derivatives–assets, at fair value-   1,056 1,137
Fair Value, Measurements, Recurring | Level 2 | Investment in unconsolidated entities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment in unconsolidated entities, at fair value   0 0
Servicing Asset at Fair Value, Amount   0 0
Servicing related asset   0 0
Loan commitments, at fair value   0 0
Fair Value, Measurements, Recurring | Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total assets   12,237,648 12,034,361
Total liabilities   (9,695,833) (9,518,871)
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 | 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 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 | 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   (1,534,592) (1,539,881)
Senior notes, at fair value   185,325 191,835
HMBS-related obligations, at fair value   (7,975,916) (7,787,155)
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(1)(2)   6,193 7,027
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(1)(2)   156,277 132,502
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(1)(2)   11,767 12,649
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(1)(2)   28,674 24,598
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(1)(2)   72,200 73,644
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(1)(2)   8,347 7,533
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)(2)   11,102 11,111
Fair Value, Measurements, Recurring | Level 3 | Securities | U.S. Treasury securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Securities, at fair value(1)(2)   0 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   3,024,744 3,115,518
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   374,233 404,324
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   3,969 4,843
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   4,920 4,086
Fair Value, Measurements, Recurring | Level 3 | Loans | Reverse mortgage loans      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Loans, at fair value   8,404,701 8,097,237
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-   76 76
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 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 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 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 | Warrants      
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 | Investment in unconsolidated entities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment in unconsolidated entities, at fair value   118,747 127,046
Servicing Asset at Fair Value, Amount   8,100 8,108
Servicing related asset   299 999
Loan commitments, at fair value   $ 3,299 $ 3,060
[1] Ellington Financial Inc.'s Condensed Consolidated Balance Sheets include assets and liabilities of variable interest entities it has consolidated. See Note 11 for additional details on Ellington Financial Inc.'s consolidated variable interest entities.
[2] Includes assets pledged as collateral to counterparties. See Note 13 for additional details on the Company's borrowings and related collateral.