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Fair Value of Financial Instruments - Financial Assets Measured at Fair Value on Recurring Basis (Detail) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Securities Available-for-Sale $ 426,556 $ 358,478
Level 1 [Member] | Fair Value on a Recurring Basis [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Securities Available-for-Sale 126,034 99,900
Level 2 [Member] | Fair Value on a Recurring Basis [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Securities Available-for-Sale 298,895 256,118
Level 3 [Member] | Fair Value on a Recurring Basis [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Securities Available-for-Sale 1,627 2,460
Interest rate swaps | Level 2 [Member] | Fair Value on a Recurring Basis [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Liabilities (976) (2,679)
U.S. Treasury [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Securities Available-for-Sale 105,999 80,270
U.S. Treasury [Member] | Level 1 [Member] | Fair Value on a Recurring Basis [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Securities Available-for-Sale 105,999 80,270
U.S. Government Agencies [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Securities Available-for-Sale 135,166 128,222
U.S. Government Agencies [Member] | Level 1 [Member] | Fair Value on a Recurring Basis [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Securities Available-for-Sale 20,035 19,630
U.S. Government Agencies [Member] | Level 2 [Member] | Fair Value on a Recurring Basis [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Securities Available-for-Sale 115,131 108,592
Mortgage-backed Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Securities Available-for-Sale 120,631 82,132
Mortgage-backed Securities [Member] | Level 2 [Member] | Fair Value on a Recurring Basis [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Securities Available-for-Sale 120,631 82,132
State and Local Governments [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Securities Available-for-Sale 64,760 67,854
State and Local Governments [Member] | Level 2 [Member] | Fair Value on a Recurring Basis [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Securities Available-for-Sale 63,133 65,394
State and Local Governments [Member] | Level 3 [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Securities Available-for-Sale 1,627 2,460
State and Local Governments [Member] | Level 3 [Member] | Fair Value on a Recurring Basis [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Total Securities Available-for-Sale $ 1,627 $ 2,460