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Derivative Instruments and Hedging Activities - Schedule of Components of Realized and Unrealized Gains and Losses (Details) - Trading - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	$ 24,476	$ 4,177
Unrealized Gains (Losses)	(71,278)	45,034
Interest rate caps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	0	0
Unrealized Gains (Losses)	(15)	2,806
Options
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	0	(211)
Unrealized Gains (Losses)	2,690	(509)
Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	26,336	5,230
Unrealized Gains (Losses)	(73,938)	43,709
Credit default swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	(1,000)	(1,011)
Unrealized Gains (Losses)	1,246	(995)
U.S. Treasury futures
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized Gains (Losses)	(860)	169
Unrealized Gains (Losses)	$ (1,261)	$ 23

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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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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

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