Fair Value - Summary of Financial Assets Measured at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale	$ 351,990	$ 354,341	[1]
Total securities available for sale	351,990	354,341
Mortgage derivative asset	455,000	112
Mortgage derivative liability	57,000	24
State and Municipal [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale	51,661	50,993
U.S. Treasury and Agencies [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale	62,153	67,162
Corporate Bonds [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale	38,857	39,850
Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale	340,187	342,435
Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale	11,803	11,906
Fair Value, Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total securities available for sale	351,990	354,341
MSR assets	27,095	28,991
Rabbi trust assets	577	584
Mortgage derivative asset	455	112
Interest rate swap asset	57	95
Mortgage derivative liability	57	24
Interest rate swap liability	57	95
Fair Value, Recurring [Member] | State and Municipal [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale	51,662	50,993
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	62,152	67,162
Fair Value, Recurring [Member] | Mortgage Backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale	199,320	196,336
Fair Value, Recurring [Member] | Corporate Bonds [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale	38,856	39,850
Fair Value, Recurring [Member] | Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Rabbi trust assets	577	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	340,187	342,435
Mortgage derivative asset	455	112
Interest rate swap asset	57	95
Mortgage derivative liability	57	24
Interest rate swap liability	57	95
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	51,662	50,993
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	62,152	67,162
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	191,816	188,719
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	34,557	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	11,803	11,906
MSR assets	27,095	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	7,504	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	$ 4,299	$ 4,289

[1] Derived from audited December 31, 2022 Consolidated Financial Statements.