Debt (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Capital Leases
Capital leases, 2014	$ 9,374
Capital leases, 2015	8,362
Capital leases, 2016	9,325
Capital leases, 2017	6,906
Capital leases, 2018	5,983
Capital leases, Thereafter	0
Capital leases, Total	39,950
Debt
Debt, 2014	4,272
Debt, 2015	860,339
Debt, 2016	699,484
Debt, 2017	1,741,992
Debt, 2018	998,647
Debt, Thereafter	165,357
Debt, Total	4,470,091us-gaap_LongTermDebt
Maturities of debt
Imputed interest	(2,390)
Present value of minimum capitalized lease payments	37,560
Current portion	(8,434)us-gaap_CapitalLeaseObligationsCurrent
Long-term capitalized lease obligation	$ 29,126

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Amount of capital lease obligation due within one year or the normal operating cycle, if longer.

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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 and due to be paid more than one year (or one operating cycle, if longer) after the balance sheet date.

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Amount of minimum lease payments for capital leases.

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Amount of minimum lease payments for capital leases due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount necessary to reduce net minimum lease payments to present value for capital leases.

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Present value of minimum lease payments for capital leases net of executory costs, including amounts paid by the lessee to the lessor for insurance, maintenance and taxes.

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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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