Leases - Summary of Other Leases Information (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Leases [Abstract]
Operating cash flows used for operating leases		$ 38,532
Operating cash flows used for finance leases		285
Financing cash flows used for finance leases		1,820
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 5,803	524,689
Right-of-use assets obtained in exchange for new finance lease liabilities		$ 217