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Commitments and Letters of Credit - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Loss Contingencies [Line Items]    
Notional amount of financial standby letters of credit $ 300,000  
Notional amount of performance standby letters of credit 1,300,000  
Notional amount of commercial letters of credit 0  
Financial instrument of credit risk 100,000 $ 100,000
Unused commitments and letters of credit [Member]    
Loss Contingencies [Line Items]    
Commitment liability $ 7,300,000 $ 10,000,000