Derivative Instruments - Reconciliation of Gross Derivative Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Derivative assets
Gross Amount of Recognized Assets (Liabilities)	$ 64,950	$ 19,604
Gross Amounts Offset in Balance Sheets	(10,792)	(13,094)
Variation Margin	(54,102)	0
Net Amounts of Assets (Liabilities) Presented in Balance Sheets	56	6,510
Derivative liabilities:
Gross Amount of Recognized Assets (Liabilities)	(19,912)	(40,541)
Gross Amounts Offset in Balance Sheets	10,792	13,094
Variation Margin	9,120	27,447
Net Amounts of Assets (Liabilities) Presented in Balance Sheets	0	0
Interest rate caps
Derivative assets
Gross Amount of Recognized Assets (Liabilities)	56	6,510
Gross Amounts Offset in Balance Sheets	0	0
Variation Margin	0	0
Net Amounts of Assets (Liabilities) Presented in Balance Sheets	56	6,510
Interest rate swaps
Derivative assets
Gross Amount of Recognized Assets (Liabilities)	63,942	13,094
Gross Amounts Offset in Balance Sheets	(10,134)	(13,094)
Variation Margin	(53,808)	0
Net Amounts of Assets (Liabilities) Presented in Balance Sheets	0	0
Derivative liabilities:
Gross Amount of Recognized Assets (Liabilities)	(10,134)	(40,541)
Gross Amounts Offset in Balance Sheets	10,134	13,094
Variation Margin	0	27,447
Net Amounts of Assets (Liabilities) Presented in Balance Sheets	0	$ 0
U.S. Treasury futures
Derivative assets
Gross Amount of Recognized Assets (Liabilities)	952
Gross Amounts Offset in Balance Sheets	(658)
Variation Margin	(294)
Net Amounts of Assets (Liabilities) Presented in Balance Sheets	0
Derivative liabilities:
Gross Amount of Recognized Assets (Liabilities)	(658)
Gross Amounts Offset in Balance Sheets	658
Variation Margin	0
Net Amounts of Assets (Liabilities) Presented in Balance Sheets	0
Credit default swaps
Derivative liabilities:
Gross Amount of Recognized Assets (Liabilities)	(9,120)
Gross Amounts Offset in Balance Sheets	0
Variation Margin	9,120
Net Amounts of Assets (Liabilities) Presented in Balance Sheets	$ 0

Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.

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