Commitments and Credit Risk - Summary of Contractual Amounts of Commitments and Standby Letters of Credit to Originate Loans and Available Lines of Credit (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Standby Letters of Credit [Member]
Commitments And Contingencies [Line Items]
Loans commitments, Fixed Rate	$ 16,990	$ 18,145
Loans commitments, Variable Rate	31,348	30,680
Commitments to Make Loans [Member]
Commitments And Contingencies [Line Items]
Loans commitments, Fixed Rate	40,581	47,465
Loans commitments, Variable Rate	436,837	343,715
Mortgage Loans in the Process of Origination [Member]
Commitments And Contingencies [Line Items]
Loans commitments, Fixed Rate	4,736	4,574
Loans commitments, Variable Rate	1,477	357
Unused Lines of Credit [Member]
Commitments And Contingencies [Line Items]
Loans commitments, Fixed Rate	150,696	124,893
Loans commitments, Variable Rate	$ 411,962	$ 355,270