Derivative Instruments - Fair Value of Reported Derivatives (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Derivatives, Fair Value [Line Items]
Notional Amount Outstanding	$ 7,411,019	$ 5,326,528
Derivative Assets	49,699	25,187
Derivative Liabilities	(52)	(1,759)
Interest rate swaps
Derivatives, Fair Value [Line Items]
Notional Amount Outstanding	3,126,000	3,014,000
Derivative Assets	39,638	21,158
Derivative Liabilities	0	0
Swap futures
Derivatives, Fair Value [Line Items]
Notional Amount Outstanding	340,000	340,000
Derivative Assets	3,864	57
Derivative Liabilities	0	(1,759)
Swaptions
Derivatives, Fair Value [Line Items]
Notional Amount Outstanding	0	600,000
Derivative Assets	0	117
Derivative Liabilities	0	0
Interest rate cap
Derivatives, Fair Value [Line Items]
Notional Amount Outstanding	3,400,000	1,000,000
Derivative Assets	1,908	0
Derivative Liabilities	0	0
TBA
Derivatives, Fair Value [Line Items]
Notional Amount Outstanding	18,000
Derivative Assets	0
Derivative Liabilities	(52)
U.S. Treasury futures
Derivatives, Fair Value [Line Items]
Notional Amount Outstanding	232,200	172,700
Derivative Assets	234	0
Derivative Liabilities	0	0
Interest rate lock commitments
Derivatives, Fair Value [Line Items]
Notional Amount Outstanding	294,819	199,828
Derivative Assets	4,055	3,855
Derivative Liabilities	$ 0	$ 0