Leases - Schedule of Leases Cost (Detail)	3 Months Ended
	Mar. 31, 2022 USD ($)
Leases [Abstract]
Lease liabilities	$ 7,653,000
Right-of-use assets	$ 7,038,000
Weighted-average remaining lease term – operating leases (in months).	175 months 18 days
Weighted-average discount rate – operating leases	2.81%
Lease Cost
Operating lease cost	$ 121,000
Total lease costs	121,000
Cash paid for amounts included in measurement of lease liabilities	$ 108,000