Leases - Summary of Future Minimum Lease Payments Under Non-cancellable Operating Leases (Detail) $ in Thousands	Jun. 30, 2019 USD ($)
Leases [Abstract]
2019 (excluding the six months ended June 30, 2019)	$ 14,154
2020	24,743
2021	24,136
2022	18,248
2023	12,015
Thereafter	20,104
Total future minimum lease payments	113,400	[1]
Less: Interest	(13,128)	[2]
Total	100,272
Current operating lease liabilities	22,279
Non-current operating lease liabilities	77,993
Total	$ 100,272

[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 commencing thereafter.