Fair Value Measurements - Activity for Level 3 Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026		Dec. 31, 2025	Mar. 31, 2025
Level 3 CMO [Roll Forward]
Other Borrowings, Fair Value Disclosure	$ 111,250		$ 113,634
Proceeds from borrowings	489,815			$ 279,842
Unrealized net holding (losses) gains on securities AFS arising during the period	(9,215)		15,671	$ 38,470
Credit-linked notes
Level 3 CMO [Roll Forward]
Other Borrowings, Fair Value Disclosure	111,250		113,634
Level 3
Level 3 CMO [Roll Forward]
Equity warrants, Balance, beginning of period	3,437
Total included in earnings	0
Total included in other comprehensive income	938
Payments for Repurchase of Warrants	0
Sales, Equity Warrants	143
Equity warrants, Balance, end of period			3,437
Warrant income (loss)	51
Fair Value, Equity, Transfers to Level 1, Amount	(1,104)
Level 3 | Credit-linked notes
Level 3 CMO [Roll Forward]
Total included in earnings	(94)
Total included in other comprehensive income	111
Proceeds from borrowings	0
Repayments of borrowings	(2,401)
Debt Securities Exercises and Settlements	0
Fair Value, Equity, Transfers to Level 1, Amount	0
Level 3 | Corporate debt securities
Level 3 CMO [Roll Forward]
Total included in earnings	0
Proceeds from borrowings	0
Repayments of borrowings	0
Debt Securities Exercises and Settlements	0
Fair Value, Measurements, Recurring
Level 3 CMO [Roll Forward]
Equity warrants, Balance, beginning of period	3,437
Equity warrants, Balance, end of period	3,363	[1]	3,437
Fair Value, Measurements, Recurring | Level 3
Level 3 CMO [Roll Forward]
Equity warrants, Balance, beginning of period	3,437
Equity warrants, Balance, end of period	3,363		3,437
Fair Value, Measurements, Recurring | Level 3 | Corporate debt securities
Level 3 CMO [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	2,250		2,370
Total included in other comprehensive income	(120)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	2,370
Fair Value, Measurements, Nonrecurring
Level 3 CMO [Roll Forward]
Assets	51,011		52,691
Fair Value, Measurements, Nonrecurring | Non Purchased Credit Impaired Loans and Leases
Level 3 CMO [Roll Forward]
Assets	50,721		52,443
Fair Value, Measurements, Nonrecurring | Level 3
Level 3 CMO [Roll Forward]
Assets	26,592		4,042
Fair Value, Measurements, Nonrecurring | Level 3 | Non Purchased Credit Impaired Loans and Leases
Level 3 CMO [Roll Forward]
Assets	26,592		$ 4,042
Asset-backed | Fair Value, Measurements, Recurring | Level 3
Level 3 CMO [Roll Forward]
Unrealized net holding (losses) gains on securities AFS arising during the period	$ (750)

[1] For information regarding derivative instruments, see "Note 9. Derivatives".