Investment in Loans (Schedule of 90 Days or More Past Due) (Details) - USD ($) $ in Thousands		Sep. 30, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Principal Balance		$ 14,926,381	$ 13,657,446
Loans, at fair value(1)(2)	[1],[2]	15,531,299	13,999,572
Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Principal Balance		3,338,338	3,689,355
Loans, at fair value(1)(2)		3,234,797	3,539,534
Commercial mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Principal Balance		546,466	370,658
Loans, at fair value(1)(2)		545,674	350,515
Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Principal Balance		241	556
Loans, at fair value(1)(2)		208	477
Non-accrual status [Member] | Residential mortgage loans | 90 Days or More Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Principal Balance		261,621	239,156
Loans, at fair value(1)(2)		241,072	224,993
Non-accrual status [Member] | Commercial mortgage loans | 90 Days or More Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Principal Balance		61,453	56,476
Loans, at fair value(1)(2)		60,726	37,558
Non-accrual status [Member] | Consumer loans | 90 Days or More Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Principal Balance		13	18
Loans, at fair value(1)(2)		$ 6	$ 13

[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.