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Derivative Instruments, Realized Gain (Loss) Related to Derivatives (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Realized gain (loss) on derivatives, net		$ (10,496)	$ (7,987)	$ 8,976	$ 7,695
Interest Rate Swaps [Member]
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Periodic interest income		4,800	8,800	15,800	25,800
Not Designated as Hedging Instrument [Member] | Realized Gain (Loss) on Derivatives [Member]
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Realized gain (loss) on derivatives, net		(15,254)	(16,831)	(6,866)	(18,111)
Not Designated as Hedging Instrument [Member] | Realized Gain (Loss) on Derivatives [Member] | Interest Rate Swaps [Member]
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Realized gain (loss) on derivatives, net	[1]	6	0	(1,161)	4,325
Not Designated as Hedging Instrument [Member] | Realized Gain (Loss) on Derivatives [Member] | TBAs [Member]
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Realized gain (loss) on derivatives, net		(13,710)	(18,274)	(6,415)	(18,771)
Not Designated as Hedging Instrument [Member] | Realized Gain (Loss) on Derivatives [Member] | U.S. Treasury Futures [Member]
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Realized gain (loss) on derivatives, net		(1,517)	1,443	710	(3,665)
Not Designated as Hedging Instrument [Member] | Realized Gain (Loss) on Derivatives [Member] | U.S. Treasury Futures Options [Member]
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Realized gain (loss) on derivatives, net		$ (33)	$ 0	$ 0	$ 0
[1] Excludes interest rate swap periodic interest income of $4.8 million and $8.8 million, for the three-month periods ended September 30, 2025 and September 30, 2024, respectively and $15.8 million and $25.8 million, for the nine-month periods ended September 30, 2025 and September 30, 2024, respectively.

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The difference between the book value and the sale price of options, swaps, futures, forward contracts, and other derivative instruments. This element refers to the gain (loss) included in earnings.

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Amount of the required periodic payment applied to interest.

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