(Schedule of Reverse Repurchase Agreements by Maturity) (Details) $ in Thousands		3 Months Ended	6 Months Ended		12 Months Ended
		Mar. 31, 2025	Jun. 30, 2025 USD ($) counterparty	Jun. 30, 2024	Dec. 31, 2024 USD ($) counterparty
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements(1)	[1]		$ 2,347,458		$ 2,584,040
Number of Counterparties with Outstanding Reverse Repurchase Agreements | counterparty			24		24
Total secured borrowings			$ 14,600,000		$ 13,900,000
Agency RMBS
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements(1)			194,536		238,135
Agency RMBS | 30 Days or Less
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements(1)			185,338		224,049
Agency RMBS | 31-60 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements(1)			582		5,006
Agency RMBS | 61-90 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements(1)			6,774		7,051
Agency RMBS | 151 to 180 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements(1)			1,842		2,029
Credit
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements(1)			1,993,075		2,088,148
Credit | 30 Days or Less
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements(1)			28,014		400,698
Credit | 31-60 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements(1)			199,551		157,630
Credit | 61-90 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements(1)			134,293		120,108
Credit | 91-120 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements(1)			863,322		130,829
Credit | 121-150 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements(1)			15,569		70,078
Credit | 151 to 180 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements(1)			145,702		33,694
Credit | 181 to 364 days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements(1)			346,280		972,732
Credit | Greater than 364 days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements(1)			260,344		202,379
Reverse mortgage loans
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements(1)			39,637		30,442
Reverse mortgage loans | 31-60 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements(1)			18,188		14,833
Reverse mortgage loans | 61-90 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements(1)			4,935		2,889
Reverse mortgage loans | 91-120 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements(1)			16,514		0
Reverse mortgage loans | 181 to 364 days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements(1)			0		12,720
U.S. Treasury securities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements(1)			120,210		227,315
U.S. Treasury securities | 30 Days or Less
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements(1)			$ 120,210		$ 227,315
Minimum
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase Agreements Interest Rate			2.84%		3.65%
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			7.69%		7.96%
Repurchase agreements, remaining days to maturity			382 days	563 days
Weighted Average
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase Agreements Interest Rate			5.90%		6.12%
Repurchase agreements, remaining days to maturity			135 days		169 days
Weighted Average | Agency RMBS
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase Agreements Interest Rate			4.52%		4.77%
Repurchase agreements, remaining days to maturity			16 days		17 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			4.50%		4.76%
Repurchase agreements, remaining days to maturity			12 days		13 days
Weighted Average | Agency RMBS | 31-60 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase Agreements Interest Rate			4.88%		4.78%
Repurchase agreements, remaining days to maturity			38 days		41 days
Weighted Average | Agency RMBS | 61-90 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase Agreements Interest Rate			4.90%		4.97%
Repurchase agreements, remaining days to maturity			87 days		85 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			5.03%		5.19%
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			6.12%		6.43%
Repurchase agreements, remaining days to maturity			156 days		205 days
Weighted Average | Credit | 30 Days or Less
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase Agreements Interest Rate			5.42%		6.68%
Repurchase agreements, remaining days to maturity			20 days		8 days
Weighted Average | Credit | 31-60 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase Agreements Interest Rate			5.31%		6.18%
Repurchase agreements, remaining days to maturity			50 days		40 days
Weighted Average | Credit | 61-90 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase Agreements Interest Rate			5.31%		5.55%
Repurchase agreements, remaining days to maturity			80 days		77 days
Weighted Average | Credit | 91-120 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase Agreements Interest Rate			6.22%		6.39%
Repurchase agreements, remaining days to maturity			98 days		115 days
Weighted Average | Credit | 121-150 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase Agreements Interest Rate			5.41%		7.19%
Repurchase agreements, remaining days to maturity		149 days			147 days
Weighted Average | Credit | 151 to 180 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase Agreements Interest Rate			6.05%		6.06%
Repurchase agreements, remaining days to maturity			168 days		166 days
Weighted Average | Credit | 181 to 364 days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase Agreements Interest Rate			6.22%		6.44%
Repurchase agreements, remaining days to maturity			241 days		275 days
Weighted Average | Credit | Greater than 364 days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase Agreements Interest Rate			6.89%		6.41%
Repurchase agreements, remaining days to maturity			366 days		545 days
Weighted Average | Reverse mortgage loans
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase Agreements Interest Rate			6.27%		6.35%
Repurchase agreements, remaining days to maturity			73 days		142 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			5.84%		5.59%
Repurchase agreements, remaining days to maturity			50 days		52 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			5.70%		5.88%
Repurchase agreements, remaining days to maturity			71 days		66 days
Weighted Average | Reverse mortgage loans | 91-120 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase Agreements Interest Rate			6.90%		0.00%
Repurchase agreements, remaining days to maturity			98 days
Weighted Average | Reverse mortgage loans | 121-150 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements, remaining days to maturity		0 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			0.00%		7.36%
Repurchase agreements, remaining days to maturity			0 days		263 days
Weighted Average | U.S. Treasury securities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase Agreements Interest Rate			4.47%		4.71%
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			4.47%		4.71%
Repurchase agreements, remaining days to maturity			1 day		2 days

[1] Ellington Financial Inc.'s Condensed 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.