Leases - Schedule of Cash Flows and Supplemental Information Associated with Leasing Activities (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 3,938	$ 14,513
Operating cash flows from finance leases	176	146
Financing cash flows from finance leases	806	692
Right of use assets obtained in exchange for lease liabilities:
Finance leases	$ 938	1,285
Operating leases		$ 133,297