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Financial Instruments With Off-Balance Sheet Risk - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Financial Instruments With Off Balance Sheet Risk [Line Items]          
Amount of allowance for credit losses for off balance sheet instruments $ 1,857   $ 1,857   $ 2,189
(Credit to) Provision for credit losses 225 $ (276) 497 $ (468)  
Unfunded Loan Commitment [Member]          
Financial Instruments With Off Balance Sheet Risk [Line Items]          
(Credit to) Provision for credit losses 110 $ 0 331 $ 60  
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   $ 1,857   $ 2,189