Leases - Summary of Supplemental Cash Flow and Non-cash Information Related to Leases (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Operating cash flows used for operating leases		$ 57,193
Operating cash flows used for finance leases		412
Financing cash flows used for finance leases		2,651
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 11,034	36,369
Right-of-use assets obtained in exchange for new finance lease liabilities		$ 217