Offsetting of Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Financial derivatives–assets
Financial derivatives–assets, at fair value	$ 160,584	$ 184,395
Financial Instruments Available for Offset	(74,181)	(70,064)
Cash Collateral (Received) Pledged	(30,333)	(50,200)
Net Amount	56,070	64,131
Reverse repurchase agreements
Reverse repurchase agreements	348,389	336,743
Financial Instruments Available for Offset	(43,090)	(161,956)
Cash Collateral (Received) Pledged	0	0
Net Amount	0	0
Financial derivatives–liabilities
Financial derivatives–liabilities, at fair value-	(81,812)	(71,024)
Financial Instruments Available for Offset	74,181	70,064
Cash Collateral (Received) Pledged	4,392	956
Net Amount	(3,239)	(4)
Repurchase agreements
Reverse repurchase agreements	(2,347,458)	(2,584,040)
Financial Instruments Available for Offset	43,090	161,956
Securities Collateral relating to Reverse Repurchase Agreements	3,000,000	3,300,000
Cash Collateral (Received) Pledged	4,542	5,311
Net Amount	0	0
Financial Derivatives - Assets
Financial derivatives–assets
Derivative Asset, Fair Value of Collateral	0	0
Repurchase agreements
Excess cash collateral	25,100	4,000
Securities Purchased under Agreements to Resell [Member]
Reverse repurchase agreements
Securities Purchased under Agreements to Resell, Fair Value of Collateral	(305,299)	(174,787)
Financial Derivatives - Liabilities
Financial derivatives–liabilities
Derivative Liability, Fair Value of Collateral	0	0
Repurchase agreements
Excess cash collateral	1,000	(100)
Reverse repurchase agreements
Repurchase agreements
Securities Collateral relating to Reverse Repurchase Agreements	$ 2,299,826	$ 2,416,773