Commitments and Contingencies - Outstanding Financial Instruments Whose Contract Amounts Represent Credit Risk (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Loss Contingencies [Line Items]
Total commitments	$ 253,296	$ 237,688
Commitments to Extend Credit [Member]
Loss Contingencies [Line Items]
Total commitments	219,195	204,163
Credit Card Commitments [Member]
Loss Contingencies [Line Items]
Total commitments	25,975	25,647
Standby Letters of Credit [Member]
Loss Contingencies [Line Items]
Total commitments	$ 8,126	$ 7,878