Loans - Schedule of Components of Provision For Credit Losses (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Loans and Leases Receivable Disclosure [Line Items]
Provision for credit losses		$ 75	$ 0	$ 225	$ 210
Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Provision for credit losses		(36)	$ 0	(19)	$ 210
Unfunded Loan Commitments [Member]
Loans and Leases Receivable Disclosure [Line Items]
Provision for credit losses	[1]	$ 111		$ 244

[1] The allowance for credit losses for unfunded loan commitments is included in other liabilities on the Company's Consolidated Balance Sheets.