Leases - Components of Lease Cost and Other Lease (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Lease cost:
Operating lease cost	$ 11,772	$ 15,020
Short-term lease cost	1,158	2,015
Variable lease cost	1,382	1,175
Total lease cost	14,312	18,210
Other information:
Cash paid for amounts included in the measurement of operating lease liabilities	17,497	15,614
ROU assets obtained in exchange for new operating lease liabilities	$ 743	$ 5,016
Weighted average remaining lease term in years – operating leases	9 years 1 month 6 days	10 years
Weighted average discount rate – operating leases	6.10%	6.00%