Financial Instruments With Off-Balance Sheet Risk - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Financial Instruments With Off Balance Sheet Risk [Line Items]
Amount of allowance for credit losses for off balance sheet instruments	$ 904		$ 904		$ 54
(Credit to) Provision for credit losses	(276)		(468)
Unfunded Loan Commitment [Member]
Financial Instruments With Off Balance Sheet Risk [Line Items]
(Credit to) Provision for credit losses	0	$ 0	60	$ 0
Other Liabilities [Member]
Financial Instruments With Off Balance Sheet Risk [Line Items]
Amount of allowance for credit losses for off balance sheet instruments	$ 904		$ 904		$ 54