Schedule of Future Minimum Lease Payments (Detail) - Accounting Standards Update 2016-02 - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
2019 (remainder)	$ 15,736
2020	31,304
2021	22,856
2022	1,430
2023	895
Thereafter	2,448
Total future minimum lease payments	74,669
Less amount representing interest	(4,999)
Lease liability	$ 69,670	$ 82,900