Supplemental Cash Flow Information Related to Leases (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 79,598
Operating cash flows from finance leases	1,589
Financing cash flows from finance leases	1,435
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	364,453
Finance leases	$ 0