Borrowings - Schedules of Borrowings (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Short-term borrowings:
Borrowings - Principal	$ 0	$ 490,000
Unamortized Deferred Issuance Costs	0	0
Unamortized Deferred Issuance Costs	(1,237)	(1,557)
Net Borrowings Outstanding	0	490,000
Long-term borrowings:
Net Borrowings Outstanding	76,428	76,108
Total borrowings
Borrowings - Principal	77,665	600,822
Unamortized Deferred Issuance Costs	(1,237)	(1,557)
Net Borrowings Outstanding	76,428	599,265
Available capacity	2,723,223	2,674,916
Total additional undrawn borrowing capacity	3,000,000
Investment securities pledged with collateral par	315,700
Asset Pledged as Collateral
Total borrowings
Available capacity	2,700,000
Senior notes
Long-term borrowings:
Borrowings - Principal	77,665	77,665
Unamortized Deferred Issuance Costs	(1,237)	(1,557)
Net Borrowings Outstanding	$ 76,428	$ 76,108
Total borrowings
Interest rates	10.00%	10.00%
Customer repurchase agreements
Short-term borrowings:
Borrowings - Principal	$ 0	$ 33,157
Net Borrowings Outstanding	$ 0	$ 33,157
Total borrowings
Interest rates	0.00%	2.67%
FHLB | Secured borrowings:
Short-term borrowings:
Borrowings - Principal	$ 0	$ 490,000
Net Borrowings Outstanding	0	490,000
Total borrowings
Available capacity	$ 1,349,351	$ 874,270
Interest rates	0.00%	4.81%
Discount window | Secured borrowings:
Total borrowings
Available capacity	$ 1,373,872	$ 1,800,646