Premises and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Property Plant And Equipment [Abstract]
Operating lease liabilities	$ 5,928	$ 3,524
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Operating lease liabilities	Operating lease liabilities
Operating lease, right-of-use asset	$ 5,963	$ 3,540
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other	Other
Sales-type lease, lease not yet commenced description	There were no sales and leaseback transactions, leverage leases, lease transactions with related parties or leases that had not yet commenced during the periods ended December 31, 2021 or 2020.