Leases - Summary of Other Leases Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases [Abstract]
Operating cash flows used for operating leases	$ 19,512
Operating cash flows used for finance leases	148
Financing cash flows used for finance leases	951
Right-of-use assets obtained in exchange for new operating lease liabilities	16,924
Right-of-use assets obtained in exchange for new finance lease liabilities	$ 217