Fair Value - Summary of Financial Assets Measured at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale	$ 321,081	$ 354,341
Total securities available for sale	321,081	354,341
Mortgage derivative asset	335	112
Mortgage derivative liability	140	24
U.S. Treasury and Agencies [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale	68,871	67,162
State and Municipal [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale	43,325	50,993
Corporate Bonds [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale	31,915	39,850
Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale	320,331	342,435
Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale	750	11,906
Fair Value, Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total securities available for sale	321,081	354,341
MSR assets	27,114	28,991
Rabbi trust assets	531	584
Mortgage derivative asset	335	112
Interest rate swap asset	71	95
Mortgage derivative liability	140	24
Interest rate swap liability	71	95
Fair Value, Recurring [Member] | Mortgage Backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale	176,970	196,336
Fair Value, Recurring [Member] | U.S. Treasury and Agencies [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale	68,871	67,162
Fair Value, Recurring [Member] | State and Municipal [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale	43,325	50,993
Fair Value, Recurring [Member] | Corporate Bonds [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale	31,915	39,850
Fair Value, Recurring [Member] | Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Rabbi trust assets	531	584
Fair Value, Recurring [Member] | Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total securities available for sale	320,331	342,435
Mortgage derivative asset	335	112
Interest rate swap asset	71	95
Mortgage derivative liability	140	24
Interest rate swap liability	71	95
Fair Value, Recurring [Member] | Level 2 [Member] | Mortgage Backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale	176,970	188,719
Fair Value, Recurring [Member] | Level 2 [Member] | U.S. Treasury and Agencies [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale	68,871	67,162
Fair Value, Recurring [Member] | Level 2 [Member] | State and Municipal [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale	43,325	50,993
Fair Value, Recurring [Member] | Level 2 [Member] | Corporate Bonds [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale	31,165	35,561
Fair Value, Recurring [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total securities available for sale	750	11,906
MSR assets	27,114	28,991
Fair Value, Recurring [Member] | Level 3 [Member] | Mortgage Backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale		7,617
Fair Value, Recurring [Member] | Level 3 [Member] | Corporate Bonds [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale	$ 750	$ 4,289