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Investment in Loans - Schedule of Unpoolable HECM Loans (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Unpaid Principal Balance $ 16,647,345 $ 16,000,731
Loans, at fair value(1)(2) [1],[2] 17,393,161 16,640,647
Unpoolable HECM loans    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Unpaid Principal Balance 53,817 59,068
Loans, at fair value(1)(2) 48,094 53,628
Unpoolable HECM loans | Assignable buyout    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Unpaid Principal Balance 23,568 29,757
Loans, at fair value(1)(2) 21,669 28,468
Unpoolable HECM loans | Non-assignable buyout    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Unpaid Principal Balance 23,682 23,169
Loans, at fair value(1)(2) 19,857 19,011
Unpoolable HECM loans | Inactive HECM tail loans    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Unpaid Principal Balance 6,567 6,142
Loans, at fair value(1)(2) $ 6,568 $ 6,149
[1] Ellington Financial Inc.'s Consolidated Balance Sheets include assets and liabilities of variable interest entities it has consolidated. See Note 12 for additional details on Ellington Financial Inc.'s consolidated variable interest entities.
[2] Includes assets pledged as collateral to counterparties. See Note 14 for additional details on the Company's borrowings and related collateral.