Debt - Schedule of Long-term Debt Outstanding (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total long-term debt	$ 3,316,247	$ 3,853,012
Capital lease obligations and sale-leaseback financings	261,650	250,842
Less: total unamortized deferred financing costs	105,839	44,648
Less: current portion of long-term debt	185,848	178,989
Long-term debt, less current portion	3,024,560	3,629,375
Disposal Group, Held-for-sale, Not Discontinued Operations
Debt Instrument [Line Items]
Long-term debt, including current portion	34,798
Liabilities Held For Sale \| Disposal Group, Held-for-sale, Not Discontinued Operations
Debt Instrument [Line Items]
Long-term debt, including current portion	34,798
Senior Notes
Debt Instrument [Line Items]
Total long-term debt	800,000	1,388,036
Lines of credit
Debt Instrument [Line Items]
Total long-term debt	51,065	66,081
Notes payable and other debt
Debt Instrument [Line Items]
Total long-term debt	626,687	650,184
Senior and Other Debt
Debt Instrument [Line Items]
Total long-term debt	3,054,597	3,602,170
Senior Long-term Debt \| Senior Notes
Debt Instrument [Line Items]
Total long-term debt	2,376,845	2,885,905
Secured Credit Facility \| Senior Secured Credit Facility
Debt Instrument [Line Items]
Total long-term debt	$ 1,576,845	$ 1,497,869

Disposal Group, Including Discontinued Operation, Long-term Debt, Including Current Maturities

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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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.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

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Amount of long-term debt and capital leases due within one year or the normal operating cycle, if longer.

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