Leases - Summary of Components of Lease Expense (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Lease Costs
Net lease cost	$ 29,695
Other Operating Expenses
Operating Leased Assets [Line Items]
Operating lease cost	22,093
Lease Costs
Short-term lease cost	461
Variable lease cost	6,989
Depreciation and Amortization
Finance lease cost:
Amortization of lease assets	573
Interest
Finance lease cost:
Interest of lease liabilities	56
Information and Other
Lease Costs
Sublease income	$ (477)