Leases - Schedule of Cash Flow Information Related to Lease Liabilities (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Lessee Disclosure [Abstract]
Cash paid for amounts included in the measurement of lease liabilities, Operating cash flows from operating leases	$ 43,624
Cash paid for amounts included in the measurement of lease liabilities, Operating cash flows from finance leases	105
Cash paid for amounts included in the measurement of lease liabilities, Financing cash flows from finance leases	982
Operating lease assets obtained in exchange for new operating lease liabilities	$ 17,516