Long-Term Debt - Schedule of Long-Term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Outstanding principal	$ 3,512,200	$ 3,617,400
Unamortized (discount) premium	37,400	35,800
Unamortized debt issuance costs	(23,900)	(25,500)
Long-term debt, including current portion	3,525,700	3,627,700
Less: current maturities	(11,006)	(11,006)
Long-term debt, noncurrent, outstanding principal	3,501,200	3,606,400
Long-term debt less current portion	3,514,731	3,616,729
Revolving Credit Facility due 2018
Debt Instrument [Line Items]
Outstanding principal	750,100	750,100
Unamortized (discount) premium	0	0
Unamortized debt issuance costs	0	0
Long-term debt, including current portion	750,100	750,100
B-2 Term Loans due 2020
Debt Instrument [Line Items]
Outstanding principal	197,000	302,200
Unamortized (discount) premium	(7,400)	(10,900)
Unamortized debt issuance costs	(1,700)	(2,400)
Long-term debt, including current portion	187,900	288,900
6.375% Senior Notes due 2021
Debt Instrument [Line Items]
Outstanding principal	850,000	850,000
Unamortized (discount) premium	0	0
Unamortized debt issuance costs	(12,500)	(13,000)
Long-term debt, including current portion	837,500	837,000
7.50% Senior Notes due 2021
Debt Instrument [Line Items]
Outstanding principal	1,040,000	1,040,000
Unamortized (discount) premium	44,800	46,700
Unamortized debt issuance costs	0	0
Long-term debt, including current portion	1,084,800	1,086,700
7.75% Senior Subordinated Notes due 2022
Debt Instrument [Line Items]
Outstanding principal	325,000	325,000
Unamortized (discount) premium	0	0
Unamortized debt issuance costs	(4,600)	(4,700)
Long-term debt, including current portion	320,400	320,300
8.75% Senior Subordinated Notes due 2020
Debt Instrument [Line Items]
Outstanding principal	350,000	350,000
Unamortized (discount) premium	0	0
Unamortized debt issuance costs	(5,100)	(5,400)
Long-term debt, including current portion	344,900	344,600
Other
Debt Instrument [Line Items]
Outstanding principal	100	100
Unamortized (discount) premium	0	0
Unamortized debt issuance costs	0	0
Long-term debt, including current portion	$ 100	$ 100

Long Term Debt, Gross, Noncurrent

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- Definition

Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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The amount of debt discount (net of debt premium) that was originally recognized at the issuance of the instrument that has yet to be amortized.

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Net amount of long-term deferred finance costs capitalized at the end of the reporting period.

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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