Leases - Schedule of Cash Flows and Supplemental Information Associated with Leasing Activities (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases [Abstract]
Operating cash flows from operating leases	$ 2,764
Operating cash flows from financing leases	40
Financing cash flows from financing leases	168
Right of use assets obtained in exchange for financing lease obligations	1,230
Right of use assets obtained in exchange for operating lease obligations	$ 133,297