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Fair Value - Summary of Financial Assets Measured at Fair Value on a Recurring Basis (Detail) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Securities available for sale $ 312,035 $ 321,081
Total securities available for sale 312,035 321,081
U.S. Treasury and Agencies [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Securities available for sale 69,455 68,871
State and Municipal [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Securities available for sale 42,937 43,325
Corporate Bonds [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Securities available for sale 35,205 31,915
Level 2 [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Securities available for sale 311,285 320,331
Level 3 [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Securities available for sale 750 750
Fair Value, Recurring [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total securities available for sale 312,035 321,081
Mortgage servicing rights assets 386 27,114
Rabbi trust assets 600 531
Mortgage derivative asset 140 335
Interest rate swap asset 95 71
Mortgage derivative liability   140
Interest rate swap liability 95 71
Fair Value, Recurring [Member] | Mortgage Backed Securities [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Securities available for sale 164,438 176,970
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 69,455 68,871
Fair Value, Recurring [Member] | State and Municipal [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Securities available for sale 42,937 43,325
Fair Value, Recurring [Member] | Corporate Bonds [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Securities available for sale 35,205 31,915
Fair Value, Recurring [Member] | Level 1 [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Rabbi trust assets 600 531
Fair Value, Recurring [Member] | Level 2 [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total securities available for sale 311,285 320,331
Mortgage derivative asset 140 335
Interest rate swap asset 95 71
Mortgage derivative liability   140
Interest rate swap liability 95 71
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 164,438 176,970
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 69,455 68,871
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 42,937 43,325
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 34,455 31,165
Fair Value, Recurring [Member] | Level 3 [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total securities available for sale 750 750
Mortgage servicing rights assets 386 27,114
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 $ 750