Leases - Schedule of Lease Balances and Classification on Unaudited Condensed Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Lessee Lease Description [Line Items]
Operating leases	$ 144,634
Total lease assets	148,440	$ 16,905
Current
Operating leases	4,105
Noncurrent
Operating leases	127,099
Total lease liabilities	135,059	2,965
Other Intangible Assets, Net [Member]
Lessee Lease Description [Line Items]
Operating leases		13,961
Other Assets Net [Member]
Lessee Lease Description [Line Items]
Financing/Capital leases	3,806
Property and Equipment, at Cost [Member]
Lessee Lease Description [Line Items]
Financing/Capital leases		3,066
Capital leases, accumulated depreciation		(122)
Other Accrued Liabilities [Member]
Current
Financing/Capital leases	700	143
Other Liabilities [Member]
Noncurrent
Financing/Capital leases	$ 3,155	$ 2,822