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Financial Instruments - Additional Information (Detail) - USD ($)
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Carrying value of foreclosed assets held for sale $ 0    
Fair Value, Inputs, Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair value of loans with specific allocated losses 18,500,000   $ 10,500,000
Accrued interest receivable reversed 314,000 $ 236,000  
Fair value of foreclosed assets held for sale $ 30,700,000   $ 30,500,000