Derivatives - Schedule of Interest Rate Hedging Instruments (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Derivative [Line Items]
Derivative assets	$ 133,000	$ 54,361,000
Derivative liabilities	22,814,000	0
U.S. Treasury futures
Derivative [Line Items]
Derivative assets	1,900,000
Derivative Instruments Not Designated as Hedging Instruments, at Carrying Value	0
Derivative liabilities		219,900,000
U.S. Treasury futures | Short position | Not Designated as Hedging Instrument, Economic Hedge
Derivative [Line Items]
Notional balance	(1,251,500,000)	(4,880,000,000)
Interest rate swaps
Derivative [Line Items]
Derivative assets	152,800,000
Derivative Instruments Not Designated as Hedging Instruments, at Carrying Value	0
Derivative liabilities		0
Interest rate swaps | Short position | Not Designated as Hedging Instrument, Economic Hedge
Derivative [Line Items]
Notional balance	$ (5,385,000,000)	$ 0
Derivative, Average Fixed Interest Rate	3.61%
Interest rate swaps | Short position | Not Designated as Hedging Instrument, Economic Hedge | Less than 5 years
Derivative [Line Items]
Notional balance	$ (1,275,000,000)
Derivative, Average Fixed Interest Rate	3.42%
Interest rate swaps | Short position | Not Designated as Hedging Instrument, Economic Hedge | Less than 7 years
Derivative [Line Items]
Notional balance	$ (3,085,000,000)
Derivative, Average Fixed Interest Rate	3.61%
Interest rate swaps | Short position | Not Designated as Hedging Instrument, Economic Hedge | 9-10 years
Derivative [Line Items]
Notional balance	$ (1,025,000,000)
Derivative, Average Fixed Interest Rate	3.83%