Leases - Schedule of Lease Costs and Classification on Unaudited Condensed Consolidated Statements of Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Lease Cost
Net lease cost	$ 5,231	$ 12,730
Operating Expense [Member]
Lessee Lease Description [Line Items]
Operating lease cost	4,890	11,671
Selling, General and Administrative Expenses [Member]
Lessee Lease Description [Line Items]
Operating lease cost	122	395
Depreciation and Amortization [Member]
Financing lease cost
Amortization of leased assets	184	552
Interest Expense [Member]
Financing lease cost
Interest on lease liabilities	$ 35	$ 112