Premises and Equipment - Schedule of Maturity Analysis of Operating Lease Liabilities and Reconciliation of Undiscounted Cash Flows to Total Operating Lease Liability (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Abstract]
Due in one year or less	$ 578
Due after one year through two years	623
Due after two years through three years	561
Due after three years through four years	435
Due after four years through five years	243
Thereafter	1,993
Total undiscounted cash flows	4,433
Discount on cash flows	(832)
Total	$ 3,601	$ 3,307