Leases - Summary of Capital Lease and Other Financing Obligations (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule Of Capitalized Lease [Line Items]
Less current portion	$ (77,844)	$ (78,705)
Total	1,441,077	$ 1,620,256
Capital Lease Obligations
Schedule Of Capitalized Lease [Line Items]
2019	103,859
2020	97,326
2021	95,414
2022	94,954
2023	95,463
Thereafter	878,755
Total minimum lease payments	1,365,771
Plus amount representing residual property value	0
Less amount representing interest	(602,026)
Present value of net minimum lease payments	763,745
Less current portion	(43,498)
Total	720,247
Other Financing Obligations (1)
Schedule Of Capitalized Lease [Line Items]
2019	80,292
2020	73,266
2021	73,672
2022	73,856
2023	69,423
Thereafter	722,496
Total minimum lease payments	1,093,005
Plus amount representing residual property value	389,643
Less amount representing interest	(727,472)
Present value of net minimum lease payments	755,176
Less current portion	(34,346)
Total	720,830
Capital lease and other financing obligations total
Schedule Of Capitalized Lease [Line Items]
2019	184,151
2020	170,592
2021	169,086
2022	168,810
2023	164,886
Thereafter	1,601,251
Total minimum lease payments	2,458,776
Plus amount representing residual property value	389,643
Less amount representing interest	(1,329,498)
Present value of net minimum lease payments	1,518,921
Less current portion	(77,844)
Total	$ 1,441,077