Derivatives - Schedule of Interest Rate Hedging Instruments (Details) - Short position - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Interest rate swaps | Not Designated as Hedging Instrument, Economic Hedge
Derivative [Line Items]
Notional balance	$ (6,335,000)	$ (5,385,000)
Derivative, Average Fixed Interest Rate	3.68%	3.61%
Interest rate swaps | Not Designated as Hedging Instrument, Economic Hedge | Less than 5 years
Derivative [Line Items]
Notional balance	$ (1,275,000)	$ (1,275,000)
Derivative, Average Fixed Interest Rate	3.42%	3.42%
Interest rate swaps | Not Designated as Hedging Instrument, Economic Hedge | Less than 7 years
Derivative [Line Items]
Notional balance	$ (3,510,000)	$ (3,085,000)
Derivative, Average Fixed Interest Rate	3.66%	3.61%
Interest rate swaps | Not Designated as Hedging Instrument, Economic Hedge | 9-10 years
Derivative [Line Items]
Notional balance	$ (1,350,000)	$ (1,025,000)
Derivative, Average Fixed Interest Rate	3.92%	3.83%
Interest rate swaps | Not Designated as Hedging Instrument, Economic Hedge | 10-15 years
Derivative [Line Items]
Notional balance	$ (200,000)
Derivative, Average Fixed Interest Rate	3.93%
U.S. Treasury futures | 30-year | Not Designated as Hedging Instrument, Economic Hedge
Derivative [Line Items]
Notional balance	$ (766,500)	$ (516,500)
U.S. Treasury futures | 10-year | Not Designated as Hedging Instrument, Economic Hedge
Derivative [Line Items]
Notional balance	(795,000)	(735,000)
U.S. Treasury futures | Not Designated as Hedging Instrument, Economic Hedge
Derivative [Line Items]
Notional balance	$ (1,561,500)	$ (1,251,500)