Leases - Summary of Future Minimum Lease Payments Under Non-cancellable Operating Leases (Detail) $ in Thousands	Mar. 31, 2019 USD ($)
Leases [Abstract]
2019 (April 1, 2019 – December 31, 2019)	$ 17,237
2020	20,498
2021	19,549
2022	14,603
2023	9,556
Thereafter	14,681
Total future minimum lease payments	96,124	[1]
Less: Interest	(10,545)	[2]
Total	85,579
Current operating lease liabilities	18,737
Non-current operating lease liabilities	66,842
Total	$ 85,579

[1] For leases commencing prior to 2019, minimum lease payments exclude payments for real estate taxes and non-lease components.

[2] We used our in-country, currency adjusted incremental borrowing rate for the discount rate for the leases at adoption date, and will use the same approach for all leases beginning in 2019 or later.