Leases - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Leases [Abstract]
Right of use lease asset	$ 6,000		$ 6,000
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Accrued interest receivable and other assets		Accrued interest receivable and other assets
Operating lease liability	$ 5,828		$ 5,828
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Accrued interest payable and other liabilities		Accrued interest payable and other liabilities
Operating lease weighted-average remaining lease term	3 years 7 months 6 days		3 years 7 months 6 days
Operating lease weighted-average discount rate	2.40%		2.40%
Operating lease revenue	$ 1,300	$ 1,100	$ 4,000	$ 3,700