Schedule of Future Minimum Lease Payments (Detail) - Accounting Standards Update 2016-02 - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
2019 (remainder)	$ 7,885
2020	32,605
2021	25,252
2022	3,801
2023	3,283
Thereafter	24,160
Total future minimum lease payments	96,986
Less amount representing interest	(12,445)
Lease liability	$ 84,541	$ 82,900