Investment in Loans (Schedule of Residential Mortgage Loans) (Details) - USD ($) $ in Thousands		6 Months Ended		12 Months Ended
		Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Principal Balance		$ 14,162,891		$ 13,657,446
Unamortized Premium (Discount)		(391,796)		(389,777)
Fair Value	[1],[2]	$ 14,668,365		$ 13,999,572
Weighted Average
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Coupon		4.89%		4.77%
Weighted Average Yield		7.27%		6.58%
Weighted average life		5 years 7 months 2 days		5 years 11 months 26 days
Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Principal Balance		$ 3,221,956		$ 3,689,355
Fair Value		3,107,555		3,539,534
Residential mortgage loans | Non-performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Principal Balance		256,376		229,140
Fair Value		239,542		215,736
Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Principal Balance		338		556
Unamortized Premium (Discount)		125		89
Amortized Cost		463		645
Gains		48		69
Losses		(240)		(237)
Fair Value		$ 271		$ 477
Consumer loans | Weighted Average
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted average life		9 months 29 days		10 months 6 days
Consolidated securitization trusts [Member] | Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Losses		$ 145,100		$ 184,800
Loans held-for-investment [Member] | Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Principal Balance		3,221,956		3,689,355
Unamortized Premium (Discount)		41,416		50,288
Amortized Cost		3,263,372		3,739,643
Gains		11,988		11,535
Losses		(167,805)		(211,644)
Fair Value		$ 3,107,555		$ 3,539,534
Loans held-for-investment [Member] | Residential mortgage loans | Weighted Average
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Coupon		7.27%		7.69%
Weighted Average Yield		6.42%		6.70%
Weighted average life		4 years 3 months 7 days		4 years 7 months 20 days
Loans held-for-investment [Member] | Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Realized Losses, Write offs on loans		$ (23)	$ (100)
Non-QM loan securitization | Residential mortgage loans | Consolidated Entities [Member] | Securitized loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair Value		$ 1,417,421		$ 1,449,266

[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.

[2] Includes assets pledged as collateral to counterparties. See Note 14 for additional details on the Company's borrowings and related collateral.