Leases - Schedule of Future Minimum Lease Payments Under Non-Cancellable Leases ASC 840 (Detail) $ in Thousands	Dec. 31, 2018 USD ($)
Leases [Abstract]
Operating Leases, 2019	$ 275,654
Operating Leases, 2020	256,931
Operating Leases, 2021	230,406
Operating Leases, 2022	182,911
Operating Leases, 2023	157,662
Operating Leases, Thereafter	524,590
Operating Leases, Total minimum lease payments	1,628,154
Finance Leases, 2019	416,952
Finance Leases, 2020	503,545
Finance Leases, 2021	506,197
Finance Leases, 2022	23,828
Finance Leases, 2023	4,776
Finance Leases, Thereafter	5,938
Total minimum lease payments, Finance Leases	1,461,236
Less: Interest	122,340
Present value of lease obligations	1,338,896
Less: Current portion, Finance Leases	345,714
Long-term portion of lease obligations	$ 993,182