Supplemental Cash Flow Information Related to Leases (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 84,351	$ 79,598
Operating cash flows from finance leases	1,431	1,589
Financing cash flows from finance leases	1,918	1,435
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$ 47,679	$ 364,453