Leases - Schedule of Lease Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019
Operating Leases
Remainder of 2019	$ 3,653
2020	15,034
2021	13,616
2022	6,158
2023	4,259
Thereafter	5,424
Total lease payments	48,144
Less imputed interest	(5,070)
Total lease liability	$ 43,074	$ 10,400