Leases - Summary of Capital Lease and Other Financing Obligations (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Schedule Of Capitalized Lease [Line Items]
Less current portion	$ (40,121)	$ (21,362)
Noncurrent portion	1,287,139	$ 1,168,042
Capital lease obligations [Member]
Schedule Of Capitalized Lease [Line Items]
2016	74,457
2017	73,537
2018	74,053
2019	74,857
2020	74,868
Thereafter	827,789
Total minimum lease payments	1,199,561
Plus amount representing residual property value	0
Less estimated building costs	0
Less amount representing interest	(557,433)
Present value of net minimum lease payments	642,128
Less current portion	(23,435)
Noncurrent portion	618,693
Other financing obligations [Member]
Schedule Of Capitalized Lease [Line Items]
2016	66,175
2017	66,116
2018	66,928
2019	63,990
2020	61,719
Thereafter	518,552
Total minimum lease payments	843,480
Plus amount representing residual property value	467,616
Less estimated building costs	(247)
Less amount representing interest	(625,717)
Present value of net minimum lease payments	685,132
Less current portion	(16,686)
Noncurrent portion	668,446
Capital Lease and Other Financing Obligations Total [Member]
Schedule Of Capitalized Lease [Line Items]
2016	140,632
2017	139,653
2018	140,981
2019	138,847
2020	136,587
Thereafter	1,346,341
Total minimum lease payments	2,043,041
Plus amount representing residual property value	467,616
Less estimated building costs	(247)
Less amount representing interest	(1,183,150)
Present value of net minimum lease payments	1,327,260
Less current portion	(40,121)
Noncurrent portion	$ 1,287,139