v3.26.1
Investment in Securities (Maturities of Securities) (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Securities, Available-for-sale [Line Items]    
Securities, at fair value(1)(2) [1],[2] $ 1,230,743 $ 1,034,882
Debt Securities, Available-for-Sale, Amortized Cost $ 1,015,396 $ 789,184
Weighted Average    
Securities, Available-for-sale [Line Items]    
Weighted Average Coupon 5.11% 5.21%
Long    
Securities, Available-for-sale [Line Items]    
Securities, at fair value(1)(2) $ 1,230,743 $ 1,034,882
Debt Securities, Available-for-Sale, Amortized Cost $ 1,272,463 $ 1,061,196
Long | Weighted Average    
Securities, Available-for-sale [Line Items]    
Weighted Average Coupon 5.44% 5.61%
Long | Non-Agency RMBS    
Securities, Available-for-sale [Line Items]    
Securities, at fair value(1)(2) $ 245,834 $ 248,165
Debt Securities, Available-for-Sale, Amortized Cost $ 231,261 $ 228,392
Long | Non-Agency RMBS | Weighted Average    
Securities, Available-for-sale [Line Items]    
Weighted Average Coupon 5.29% 5.09%
Long | CLOs And Other Securities [Member]    
Securities, Available-for-sale [Line Items]    
Securities, at fair value(1)(2) $ 300,548 $ 291,430
Debt Securities, Available-for-Sale, Amortized Cost $ 318,173 $ 308,408
Long | CLOs And Other Securities [Member] | Weighted Average    
Securities, Available-for-sale [Line Items]    
Weighted Average Coupon 4.16% 4.31%
Long | CLOs And Other Securities [Member] | Less than three years [Member]    
Securities, Available-for-sale [Line Items]    
Securities, at fair value(1)(2) $ 154,378 $ 131,748
Debt Securities, Available-for-Sale, Amortized Cost $ 165,863 $ 143,309
Long | CLOs And Other Securities [Member] | Less than three years [Member] | Weighted Average    
Securities, Available-for-sale [Line Items]    
Weighted Average Coupon 4.68% 4.65%
Long | CLOs And Other Securities [Member] | Greater than three years less than seven years [Member]    
Securities, Available-for-sale [Line Items]    
Securities, at fair value(1)(2) $ 99,554 $ 97,330
Debt Securities, Available-for-Sale, Amortized Cost $ 99,798 $ 96,852
Long | CLOs And Other Securities [Member] | Greater than three years less than seven years [Member] | Weighted Average    
Securities, Available-for-sale [Line Items]    
Weighted Average Coupon 4.04% 4.54%
Long | CLOs And Other Securities [Member] | Greater than seven years less than eleven [Member]    
Securities, Available-for-sale [Line Items]    
Securities, at fair value(1)(2) $ 45,968 $ 54,507
Debt Securities, Available-for-Sale, Amortized Cost $ 51,900 $ 58,027
Long | CLOs And Other Securities [Member] | Greater than seven years less than eleven [Member] | Weighted Average    
Securities, Available-for-sale [Line Items]    
Weighted Average Coupon 0.98% 1.97%
Long | CLOs And Other Securities [Member] | Greater than eleven year [Member]    
Securities, Available-for-sale [Line Items]    
Securities, at fair value(1)(2) $ 648 $ 7,845
Debt Securities, Available-for-Sale, Amortized Cost $ 612 $ 10,220
Long | CLOs And Other Securities [Member] | Greater than eleven year [Member] | Weighted Average    
Securities, Available-for-sale [Line Items]    
Weighted Average Coupon 5.80% 0.48%
Long | Non-Agency IOs    
Securities, Available-for-sale [Line Items]    
Securities, at fair value(1)(2) $ 303,719 $ 206,780
Debt Securities, Available-for-Sale, Amortized Cost $ 311,725 $ 212,700
Long | Non-Agency IOs | Weighted Average    
Securities, Available-for-sale [Line Items]    
Weighted Average Coupon 0.74% 0.76%
Long | Mortgage-Backed Securities, Other    
Securities, Available-for-sale [Line Items]    
Securities, at fair value(1)(2) $ 457,038 $ 273,322
Debt Securities, Available-for-Sale, Amortized Cost $ 473,797 $ 268,649
Long | Mortgage-Backed Securities, Other | Weighted Average    
Securities, Available-for-sale [Line Items]    
Weighted Average Coupon 4.68% 4.85%
Long | Mortgage-Backed Securities, Other | Less than three years [Member]    
Securities, Available-for-sale [Line Items]    
Securities, at fair value(1)(2) $ 159,481 $ 146,952
Debt Securities, Available-for-Sale, Amortized Cost $ 147,739 $ 131,966
Long | Mortgage-Backed Securities, Other | Less than three years [Member] | Weighted Average    
Securities, Available-for-sale [Line Items]    
Weighted Average Coupon 4.51% 4.28%
Long | Mortgage-Backed Securities, Other | Greater than three years less than seven years [Member]    
Securities, Available-for-sale [Line Items]    
Securities, at fair value(1)(2) $ 131,868 $ 63,801
Debt Securities, Available-for-Sale, Amortized Cost $ 145,214 $ 63,710
Long | Mortgage-Backed Securities, Other | Greater than three years less than seven years [Member] | Weighted Average    
Securities, Available-for-sale [Line Items]    
Weighted Average Coupon 5.25% 5.50%
Long | Mortgage-Backed Securities, Other | Greater than seven years less than eleven [Member]    
Securities, Available-for-sale [Line Items]    
Securities, at fair value(1)(2) $ 144,885 $ 33,728
Debt Securities, Available-for-Sale, Amortized Cost $ 159,654 $ 45,339
Long | Mortgage-Backed Securities, Other | Greater than seven years less than eleven [Member] | Weighted Average    
Securities, Available-for-sale [Line Items]    
Weighted Average Coupon 4.03% 4.78%
Long | Mortgage-Backed Securities, Other | Greater than eleven year [Member]    
Securities, Available-for-sale [Line Items]    
Securities, at fair value(1)(2) $ 20,804 $ 28,841
Debt Securities, Available-for-Sale, Amortized Cost $ 21,190 $ 27,634
Long | Mortgage-Backed Securities, Other | Greater than eleven year [Member] | Weighted Average    
Securities, Available-for-sale [Line Items]    
Weighted Average Coupon 6.59% 6.78%
Long | Interest only securities    
Securities, Available-for-sale [Line Items]    
Securities, at fair value(1)(2) $ 324,512 $ 206,780
Debt Securities, Available-for-Sale, Amortized Cost $ 331,405 $ 212,700
Long | Interest only securities | Weighted Average    
Securities, Available-for-sale [Line Items]    
Weighted Average Coupon 0.77% 0.76%
Long | Interest only securities | Less than three years [Member]    
Securities, Available-for-sale [Line Items]    
Securities, at fair value(1)(2) $ 212,912 $ 163,836
Debt Securities, Available-for-Sale, Amortized Cost $ 226,828 $ 174,260
Long | Interest only securities | Less than three years [Member] | Weighted Average    
Securities, Available-for-sale [Line Items]    
Weighted Average Coupon 1.46% 1.49%
Long | Interest only securities | Greater than three years less than seven years [Member]    
Securities, Available-for-sale [Line Items]    
Securities, at fair value(1)(2) $ 83,753 $ 27,982
Debt Securities, Available-for-Sale, Amortized Cost $ 81,265 $ 29,167
Long | Interest only securities | Greater than three years less than seven years [Member] | Weighted Average    
Securities, Available-for-sale [Line Items]    
Weighted Average Coupon 0.36% 0.22%
Long | Interest only securities | Greater than seven years less than eleven [Member]    
Securities, Available-for-sale [Line Items]    
Securities, at fair value(1)(2) $ 27,153 $ 14,715
Debt Securities, Available-for-Sale, Amortized Cost $ 22,635 $ 9,083
Long | Interest only securities | Greater than seven years less than eleven [Member] | Weighted Average    
Securities, Available-for-sale [Line Items]    
Weighted Average Coupon 0.28% 0.14%
Long | Interest only securities | Greater than eleven year [Member]    
Securities, Available-for-sale [Line Items]    
Securities, at fair value(1)(2) $ 694 $ 247
Debt Securities, Available-for-Sale, Amortized Cost $ 677 $ 190
Long | Interest only securities | Greater than eleven year [Member] | Weighted Average    
Securities, Available-for-sale [Line Items]    
Weighted Average Coupon 1.10% 1.24%
[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.