Derivative Financial Instruments - Schedule of Fair Value and Notional Amount of Derivatives (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Derivative [Line Items]
Fair Value	$ (1,364)	$ 77,447
Notional Amount	42,884,440	41,557,599
Derivative Liabilities
Derivative [Line Items]
Fair Value	(156,244)	(28,150)
Notional Amount	18,292,921	11,088,734
Derivative Assets
Derivative [Line Items]
Fair Value	154,880	105,597
Notional Amount	24,591,519	30,468,865
TBAs | Derivative Liabilities
Derivative [Line Items]
Fair Value	(144,127)	(22,252)
Notional Amount	15,655,000	8,750,000
TBAs | Derivative Assets
Derivative [Line Items]
Fair Value	56,893	38,686
Notional Amount	9,775,000	14,690,000
Interest rate futures | Derivative Liabilities
Derivative [Line Items]
Fair Value	(2,080)	(4,721)
Notional Amount	495,000	1,969,000
Interest rate futures | Derivative Assets
Derivative [Line Items]
Fair Value	12,888	17,772
Notional Amount	1,270,400	2,431,300
Swaptions | Derivative Assets
Derivative [Line Items]
Fair Value	75,222	31,119
Notional Amount	11,525,000	9,850,000
LPCs and IRLCs | Derivative Liabilities
Derivative [Line Items]
Fair Value	(10,037)	(1,177)
Notional Amount	2,142,921	369,734
LPCs and IRLCs | Derivative Assets
Derivative [Line Items]
Fair Value	9,877	18,020
Notional Amount	$ 2,021,119	$ 3,497,565