Leases - Schedule of Operating Lease Expenses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Lessee Lease Description [Line Items]
Total lease costs	$ 4,809	$ 5,050	$ 5,343
Operating and Maintenance [Member]
Lessee Lease Description [Line Items]
Total lease costs	2,596	2,645	2,716
General and Administrative [Member]
Lessee Lease Description [Line Items]
Total lease costs	$ 2,213	$ 2,405	$ 2,627