Investment Securities - Schedule of Activity in the ACL for Held-to-maturity Debt Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Allowance for credit losses:
Beginning balance	$ 196	$ 434
Credit loss reduction	(50)	(238)
Securities charged-off	0	0
Recoveries	0	0
Total ending allowance balance	146	196
State and political subdivisions
Allowance for credit losses:
Beginning balance	80	212
Credit loss reduction	(12)	(132)
Securities charged-off	0	0
Recoveries	0	0
Total ending allowance balance	68	80
Corporate securities
Allowance for credit losses:
Beginning balance	116	222
Credit loss reduction	(38)	(106)
Securities charged-off	0	0
Recoveries	0	0
Total ending allowance balance	$ 78	$ 116