Notes and Other Debt - Schedule of Notes and Other Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Principal amount of notes and other debt	$ 4,641,617	$ 4,626,887
Less unamortized discount, premium and debt issuance costs	(138,155)	(144,190)
Notes and other debt less unamortized discount, premium and debt issuance costs	4,503,462	4,482,697
Senior Secured Term Loan B Facility
Debt Instrument [Line Items]
Principal amount of notes and other debt	2,081,617	2,086,887
Less unamortized discount, premium and debt issuance costs	(82,998)	(87,140)
Senior Secured Notes - 6.00% Due April 15, 2023
Debt Instrument [Line Items]
Principal amount of notes and other debt	550,000	550,000
Less unamortized discount, premium and debt issuance costs	(8,168)	(8,508)
Senior Unsecured Notes - 8.25% Due October 15, 2023
Debt Instrument [Line Items]
Principal amount of notes and other debt	1,110,000	1,110,000
Less unamortized discount, premium and debt issuance costs	(39,122)	(40,467)
Senior Unsecured Notes - 7.125% Due December 15, 2024
Debt Instrument [Line Items]
Principal amount of notes and other debt	600,000	600,000
Less unamortized discount, premium and debt issuance costs	(7,867)	(8,075)
Senior Secured Revolving Credit Facility
Debt Instrument [Line Items]
Principal amount of notes and other debt	$ 300,000	$ 280,000

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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Amount of unamortized debt discount (premium) and debt issuance costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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