Derivative Instruments - Fair Value of Reported Derivatives (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024
Derivatives, Fair Value [Line Items]
Notional Amount Outstanding	$ 3,155,000	$ 2,200,000
Derivative assets, at fair value	0	117
Derivatives, at fair value, net	(240)	0
Interest Rate Swaps
Derivatives, Fair Value [Line Items]
Notional Amount Outstanding	2,000,000	1,500,000
Derivative assets, at fair value	0	0
Derivatives, at fair value, net	0	0
Swap futures
Derivatives, Fair Value [Line Items]
Notional Amount Outstanding	155,000
Derivative assets, at fair value	0
Derivatives, at fair value, net	(240)
Swaptions
Derivatives, Fair Value [Line Items]
Notional Amount Outstanding	0	500,000	$ 1,000,000
Derivative assets, at fair value	0	0
Derivatives, at fair value, net	0	0
U.S. Treasury futures
Derivatives, Fair Value [Line Items]
Notional Amount Outstanding	0	200,000
Derivative assets, at fair value	0	117
Derivatives, at fair value, net	0	$ 0
Interest Rate Cap
Derivatives, Fair Value [Line Items]
Notional Amount Outstanding	1,000,000
Derivative assets, at fair value	0
Derivatives, at fair value, net	$ 0