Securities Purchased under Resale Agreements and Sold Under Repurchase Agreements - Schedule of Balance Sheet Offsetting for Resale and Repurchase Agreements (Details) - USD ($)	Jun. 30, 2026	Dec. 31, 2025
Resale agreements
Gross Amounts of Recognized Assets / Liabilities	$ 425,000,000	$ 425,000,000
Gross Amounts Offset on the Consolidated Balance Sheet	0	0
Net Amounts of Assets / Liabilities Presented on the Consolidated Balance Sheet	425,000,000	425,000,000
Gross Amounts Not Offset on the Consolidated Balance Sheet: Collateral Received / Collateral Pledged
Collateral Received	(349,266,000)	(350,953,000)
Net Amount	75,734,000	74,047,000
Repurchase agreements
Gross Amounts of Recognized Liabilities	956,894,000	0
Gross Amounts Offset on the Consolidated Balance Sheet	0
Net Amounts of Liabilities Presented on the Consolidated Balance Sheet	956,894,000	$ 0
Gross Amounts Not Offset on the Consolidated Balance Sheet
Collateral pledged	(956,731,000)
Net Amount	$ 163,000