Leases - Schedule of Maturity of Operating Lease Liabilities (Detail) $ in Thousands	Jun. 30, 2019 USD ($)
Leases [Abstract]
2019	$ 18,002
2020	32,625
2021	28,372
2022	22,535
2023	20,808
Thereafter	71,044
Total undiscounted lease payments	193,386
Less: imputed interest	(27,328)
Total lease liabilities	$ 166,058