Leases - Other Information Related to Operating Leases (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Supplemental Cash Flow Information Related to Leases [Abstract]
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 109,515	$ 103,788
Cash paid for amounts included in the measurement of lease liabilities	$ 90,101	$ 79,040