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Financial Instruments With Off-Balance Sheet Risk - Additional Information (Detail) - USD ($)
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Financial Instruments With Off Balance Sheet Risk [Line Items]      
Amount of allowance for credit losses for off balance sheet instruments $ 1,857,000   $ 1,857,000
(Credit to) Provision for credit losses 265,000 $ 145,000  
Unfunded Loan Commitment [Member]      
Financial Instruments With Off Balance Sheet Risk [Line Items]      
(Credit to) Provision for credit losses 0    
Other Liabilities [Member]      
Financial Instruments With Off Balance Sheet Risk [Line Items]      
Amount of allowance for credit losses for off balance sheet instruments $ 1,857,000   $ 1,857,000