Non-controlling Interests (Details) - USD ($) $ in Thousands		9 Months Ended	12 Months Ended
		Sep. 30, 2025	Dec. 31, 2024
Noncontrolling Interest [Line Items]
Non-controlling interests(1)	[1]	$ 30,099	$ 20,346
Longbridge Financial LLC [Member]
Noncontrolling Interest [Line Items]
Business Combination, Step Acquisition, Equity Interest in Acquiree, Including Subsequent Acquisition, Percentage			99.60%
Non-controlling interest of joint venture partner | Non-controlling Interest
Noncontrolling Interest [Line Items]
Non-controlling interests(1)		$ 14,400	$ 8,000
Operating Partnership | Non-controlling Interest
Noncontrolling Interest [Line Items]
Operating Partnership LTIP Units (in units)		1,105,418	846,620
Operating Partnership Units (in units)		46,360	46,360
Ownership Percentage		0.90%	0.80%
Noncontrolling Interest in Operating Partnerships		$ 15,600	$ 12,200
Longbridge Financial LLC [Member] | Non-controlling Interest
Noncontrolling Interest [Line Items]
Non-controlling interests(1)			$ 2,400

[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.