v3.26.1
(Schedule of Reverse Repurchase Agreements by Maturity) (Details)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
USD ($)
counterparty
Mar. 31, 2025
Dec. 31, 2025
USD ($)
counterparty
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase agreements(1) [1] $ 2,894,972   $ 2,655,444
Number of Counterparties with Outstanding Reverse Repurchase Agreements | counterparty 22   21
Total secured borrowings $ 17,100,000   $ 16,300,000
Agency RMBS      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase agreements(1) 198,120   201,691
Agency RMBS | 30 Days or Less      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase agreements(1) 188,294   193,105
Agency RMBS | 31-60 Days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase agreements(1) 1,844   317
Agency RMBS | 61-90 Days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase agreements(1) 6,421   6,606
Agency RMBS | 151 to 180 Days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase agreements(1) 1,561   1,663
Credit      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase agreements(1) 2,373,204   2,299,445
Credit | 30 Days or Less      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase agreements(1) 10,765   40,822
Credit | 31-60 Days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase agreements(1) 306,556   396,480
Credit | 61-90 Days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase agreements(1) 154,036   198,525
Credit | 91-120 Days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase agreements(1) 500,291   361,230
Credit | 151 to 180 Days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase agreements(1) 11,093   11,480
Credit | 181 to 364 days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase agreements(1) 231,786   164,965
Credit | Greater than 364 days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase agreements(1) 1,158,677   1,125,943
Reverse mortgage loans      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase agreements(1) 192,965   120,998
Reverse mortgage loans | 31-60 Days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase agreements(1) 0   9,850
Reverse mortgage loans | 61-90 Days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase agreements(1) 14,939   5,754
Reverse mortgage loans | 121-150 Days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase agreements(1) 7,418   0
Reverse mortgage loans | 181 to 364 days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase agreements(1) 141,966   52,935
Reverse mortgage loans | Greater than 364 days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase agreements(1) 28,642   52,459
U.S. Treasury securities      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase agreements(1) 130,683   33,310
U.S. Treasury securities | 30 Days or Less      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase agreements(1) $ 130,683   $ 33,310
Minimum      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase Agreements Interest Rate 2.82%   2.79%
Repurchase agreements, remaining days to maturity 1 day 2 days  
Maximum      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase Agreements Interest Rate 6.94%   7.05%
Repurchase agreements, remaining days to maturity 736 days 636 days  
Weighted Average      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase Agreements Interest Rate 5.12%   5.18%
Repurchase agreements, remaining days to maturity 263 days   268 days
Weighted Average | Agency RMBS      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase Agreements Interest Rate 3.78%   4.01%
Repurchase agreements, remaining days to maturity 7 days   8 days
Weighted Average | Agency RMBS | 30 Days or Less      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase Agreements Interest Rate 3.76%   4.00%
Repurchase agreements, remaining days to maturity 2 days   4 days
Weighted Average | Agency RMBS | 31-60 Days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase Agreements Interest Rate 4.20%   4.43%
Repurchase agreements, remaining days to maturity 53 days   40 days
Weighted Average | Agency RMBS | 61-90 Days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase Agreements Interest Rate 4.23%   4.26%
Repurchase agreements, remaining days to maturity 83 days   86 days
Weighted Average | Agency RMBS | 151 to 180 Days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase Agreements Interest Rate 4.33%   4.41%
Repurchase agreements, remaining days to maturity 163 days   161 days
Weighted Average | Credit      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase Agreements Interest Rate 5.24%   5.40%
Repurchase agreements, remaining days to maturity 301 days   302 days
Weighted Average | Credit | 30 Days or Less      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase Agreements Interest Rate 5.03%   5.56%
Repurchase agreements, remaining days to maturity 16 days   17 days
Weighted Average | Credit | 31-60 Days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase Agreements Interest Rate 4.37%   5.20%
Repurchase agreements, remaining days to maturity 44 days   46 days
Weighted Average | Credit | 61-90 Days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase Agreements Interest Rate 4.41%   4.47%
Repurchase agreements, remaining days to maturity 79 days   75 days
Weighted Average | Credit | 91-120 Days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase Agreements Interest Rate 4.95%   5.22%
Repurchase agreements, remaining days to maturity 118 days   115 days
Weighted Average | Credit | 151 to 180 Days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase Agreements Interest Rate 4.55%   4.62%
Repurchase agreements, remaining days to maturity 163 days   161 days
Weighted Average | Credit | 181 to 364 days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase Agreements Interest Rate 5.72%   5.69%
Repurchase agreements, remaining days to maturity 273 days   293 days
Weighted Average | Credit | Greater than 364 days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase Agreements Interest Rate 5.61%   5.66%
Repurchase agreements, remaining days to maturity 487 days   505 days
Weighted Average | Reverse mortgage loans      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase Agreements Interest Rate 5.95%   6.03%
Repurchase agreements, remaining days to maturity 233 days   356 days
Weighted Average | Reverse mortgage loans | 31-60 Days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase Agreements Interest Rate 0.00%   5.00%
Repurchase agreements, remaining days to maturity     55 days
Weighted Average | Reverse mortgage loans | 61-90 Days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase Agreements Interest Rate 4.90%   5.16%
Repurchase agreements, remaining days to maturity 79 days   68 days
Weighted Average | Reverse mortgage loans | 121-150 Days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase Agreements Interest Rate 6.81%   0.00%
Repurchase agreements, remaining days to maturity 126 days    
Weighted Average | Reverse mortgage loans | 181 to 364 days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase Agreements Interest Rate 6.02%   6.37%
Repurchase agreements, remaining days to maturity 216 days   284 days
Weighted Average | Reverse mortgage loans | Greater than 364 days      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase Agreements Interest Rate 5.93%   5.97%
Repurchase agreements, remaining days to maturity 487 days   505 days
Weighted Average | U.S. Treasury securities      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase Agreements Interest Rate 3.71%   3.99%
Repurchase agreements, remaining days to maturity 1 day   2 days
Weighted Average | U.S. Treasury securities | 30 Days or Less      
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]      
Repurchase Agreements Interest Rate 3.71%   3.99%
Repurchase agreements, remaining days to maturity 1 day   2 days
[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.