Leases - Schedule of components of lease expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease cost	$ 3,232	$ 3,450	$ 3,612
Finance lease cost:
Amortization of right-of-use assets	308	308	309
Interest on lease liability	315	338	360
Total finance lease cost	623	646	669
Total lease cost	$ 3,855	$ 4,096	$ 4,281