Derivative Instruments - Components of Investment Fair Value Changes (Details) - Trading - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	$ 24,094	$ 12,097	$ 2,995
Unrealized Gains (Losses)	(84,065)	83,899	(29,373)
Interest rate caps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	0	0	7,031
Unrealized Gains (Losses)	57	3,211	(1,926)
Options
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	1,137	(2,261)	(4,036)
Unrealized Gains (Losses)	0	0	0
IRLCs
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	0	0	0
Unrealized Gains (Losses)	(3,611)	0	0
TBAs
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	369	0	0
Unrealized Gains (Losses)	0	0	0
Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	36,606	19,918	0
Unrealized Gains (Losses)	(92,677)	81,255	(27,447)
Credit default swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	(4,655)	(4,067)	0
Unrealized Gains (Losses)	(167)	(861)	0
U.S. Treasury futures
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	(18,426)	(1,493)	0
Unrealized Gains (Losses)	4,317	294	0
Commodity futures
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	9,063	0	0
Unrealized Gains (Losses)	$ 8,016	$ 0	$ 0