Derivative Instruments - Schedule of Components of Realized and Unrealized Gains and Losses (Details) - Trading - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	$ 38,595	$ 24,476
Unrealized Gains (Losses)	49,244	(71,278)
Interest rate caps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	0	0
Unrealized Gains (Losses)	(41)	(15)
Options
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	(752)	0
Unrealized Gains (Losses)	0	2,690
IRLCs
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	0	0
Unrealized Gains (Losses)	464	0
TBAs
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	(100)	0
Unrealized Gains (Losses)	(1,523)	0
Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	(3,177)	26,336
Unrealized Gains (Losses)	36,689	(73,938)
Credit default swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	(270)	(1,000)
Unrealized Gains (Losses)	971	1,246
U.S. Treasury futures
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	(5,663)	(860)
Unrealized Gains (Losses)	20,699	(1,261)
Commodity futures
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	48,557	0
Unrealized Gains (Losses)	$ (8,015)	$ 0