Leases (Other Supplementary Data) (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	$ 34,051	$ 22,370
Operating cash flows from finance leases	40	42
Financing cash flows from finance leases	339	414
Right-of-Use Assets
Operating leases	$ 40,506	$ 22,922
Weighted Average Remaining Lease Term (in years)
Operating leases	8 years 10 months 6 days	7 years 11 months 26 days
Finance leases	2 years 8 months 8 days	2 years 2 months 19 days
Weighted Average Discount Rate
Operating leases	6.68%	7.45%
Finance Lease, Weighted Average Discount Rate, Percent	6.22%	7.44%