Supplemental Cash Flow Information Related to Leases (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 88,113	$ 84,351
Operating cash flows from finance leases	3,507	1,431
Financing cash flows from finance leases	2,315	1,918
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	20,292	$ 47,679
Finance leases	$ 7,690