Leases - Summary of Future Lease Payments under Leases (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Operating Leases
2019	$ 53,014
2020	63,870	$ 70,478
2021	52,674	60,382
2022	48,376	57,531
2023	45,912	56,511
Thereafter	429,013	318,147
Total lease payments	692,859	669,004
Less: imputed interest	(195,593)
Present value of lease payments	497,266
Less: current lease obligations	(50,776)
Total long-term lease obligations	446,490
Financing Leases
2019	2,956
2020	3,243	2,695
2021	1,951	1,735
2022	1,094	1,004
2023	779	713
Thereafter	4,176	3,893
Total lease payments	14,199	13,758
Less: imputed interest	(2,881)	(2,879)
Total finance lease liabilities	11,318	10,879
Less: current lease obligations	(3,456)	(3,249)
Other noncurrent liabilities	$ 7,862	$ 7,630