Debt - Schedule of Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
2018	$ 1,078,010
2019	465,562
2020	566,599
2021	400,473
2022	406,449
Thereafter	2,951,858
Total obligations	5,868,951
Less amount representing debt discount and deferred financing costs, net	(22,954)
Less amount representing interest (weighted average interest rate of 6.75%)	(703,706)
Total	5,142,291	$ 6,045,167
Long-term Debt
Debt Instrument [Line Items]
2018	501,622
2019	328,515
2020	488,311
2021	338,632
2022	343,859
Thereafter	1,892,752
Total obligations	3,893,691
Less amount representing debt discount and deferred financing costs, net	(22,954)
Less amount representing interest (weighted average interest rate of 6.75%)	0
Total	3,870,737
Capital and Financing Lease Obligations
Debt Instrument [Line Items]
2018	576,388
2019	137,047
2020	78,288
2021	61,841
2022	62,590
Thereafter	1,059,106
Total obligations	1,975,260
Less amount representing debt discount and deferred financing costs, net	0
Less amount representing interest (weighted average interest rate of 6.75%)	(703,706)
Total	$ 1,271,554	$ 2,485,520