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SEC Schedule, Article 12-29, Mortgage Loans on Real Estate (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Loans, at fair value(1)(2) [1],[2] $ 17,393,161 $ 16,640,647
Residential mortgage loans    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Loans, at fair value(1)(2) 3,748,165 3,643,094
Residential mortgage loans | Non-performing    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Loans, at fair value(1)(2) 212,807 246,586
Reverse mortgage loans    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Loans, at fair value(1)(2) 12,990,186 12,331,316
Commercial mortgage loans    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Loans, at fair value(1)(2) 623,196 640,712
Commercial mortgage loans | Non-performing    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Loans, at fair value(1)(2) $ 35,200 $ 64,100
[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.