v3.26.1
Fair Value Disclosures - Fair Value Information for Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets at fair value on a recurring basis $ 359,771 $ 357,740
Mortgage banking derivative asset, fair value 883 883
Mortgage banking derivative liability, fair value 26 58
Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets at fair value on a recurring basis 23,776 23,997
Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets at fair value on a recurring basis 335,995 333,743
Fair Value on a Recurring Basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets at fair value on a recurring basis 361,532 358,926
Mortgage banking derivative asset, fair value 883 883
Mortgage banking derivative liability, fair value 26 58
Fair Value on a Recurring Basis [Member] | Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets at fair value on a recurring basis 24,654 24,300
Fair Value on a Recurring Basis [Member] | Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets at fair value on a recurring basis 336,103 333,781
Mortgage banking derivative asset, fair value 108 38
Mortgage banking derivative liability, fair value 26 58
Fair Value on a Recurring Basis [Member] | Level 3 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets at fair value on a recurring basis 775 845
Mortgage banking derivative asset, fair value 775 845
Fair Value on a Recurring Basis [Member] | U.S. Treasury [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets at fair value on a recurring basis 23,776 23,997
Fair Value on a Recurring Basis [Member] | U.S. Treasury [Member] | Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets at fair value on a recurring basis 23,776 23,997
Fair Value on a Recurring Basis [Member] | U.S. Government Agencies [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets at fair value on a recurring basis 48,679 45,228
Fair Value on a Recurring Basis [Member] | U.S. Government Agencies [Member] | Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets at fair value on a recurring basis 48,679 45,228
Fair Value on a Recurring Basis [Member] | GSE - Mortgage-backed Securities and CMO's [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets at fair value on a recurring basis 165,124 174,754
Fair Value on a Recurring Basis [Member] | GSE - Mortgage-backed Securities and CMO's [Member] | Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets at fair value on a recurring basis 165,124 174,754
Fair Value on a Recurring Basis [Member] | Asset-backed Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets at fair value on a recurring basis 19,545 20,965
Fair Value on a Recurring Basis [Member] | Asset-backed Securities [Member] | Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets at fair value on a recurring basis 19,545 20,965
Fair Value on a Recurring Basis [Member] | State and Political Subdivisions [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets at fair value on a recurring basis 98,697 88,886
Fair Value on a Recurring Basis [Member] | State and Political Subdivisions [Member] | Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets at fair value on a recurring basis 98,697 88,886
Fair Value on a Recurring Basis [Member] | Corporate Bonds [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets at fair value on a recurring basis 3,950 3,910
Fair Value on a Recurring Basis [Member] | Corporate Bonds [Member] | Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets at fair value on a recurring basis 3,950 3,910
Fair Value on a Recurring Basis [Member] | Equity Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets at fair value on a recurring basis 878 303
Fair Value on a Recurring Basis [Member] | Equity Securities [Member] | Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets at fair value on a recurring basis 878 303
Fair Value on a Recurring Basis [Member] | Mortgage Banking Derivatives [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Mortgage banking derivative liability, fair value 26 58
Fair Value on a Recurring Basis [Member] | Mortgage Banking Derivatives [Member] | Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Mortgage banking derivative liability, fair value $ 26 $ 58