Leases and Other Finance Obligations - Summary of Future Maturities of Lease Liabilities (Detail) $ in Thousands	Jun. 30, 2019 USD ($)
Finance Leases
2019 (from July 1, 2019)	$ 6,054
2020	7,972
2021	3,811
2022	559
Total lease payments	18,396
Less: amount representing interest	(1,049)
Present value of lease liabilities	17,347
Less: current portion	(10,148)
Long-term lease liabilities, net of current portion	7,199
Operating Leases
2019 (from July 1, 2019)	39,393
2020	72,824
2021	62,087
2022	47,155
2023	34,123
Thereafter	85,615
Total lease payments	341,197
Less: amount representing interest	(62,620)
Present value of lease liabilities	278,577
Less: current portion	(60,576)
Long-term lease liabilities, net of current portion	$ 218,001