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Commitments and Contingencies Capital Leases (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Capital Leased Assets [Line Items]
2015	$ 14,936us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent
2016	14,136us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears
2017	9,424us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears
2018	697us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears
2019	522us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears
Thereafter	0us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter
Total minimum lease payments	39,715us-gaap_CapitalLeasesFutureMinimumPaymentsDue
Less: Amount representing interest	(1,456)us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments
Present value of net minimum capital lease payments	38,259us-gaap_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments
Less: Current portion of capital lease obligations	(14,872)us-gaap_CapitalLeaseObligationsCurrent	(3,636)us-gaap_CapitalLeaseObligationsCurrent
Total long-term capital lease obligations	$ 23,387us-gaap_CapitalLeaseObligationsNoncurrent	$ 5,665us-gaap_CapitalLeaseObligationsNoncurrent

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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 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 of minimum lease payments for capital leases due in the third 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 second 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 after 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 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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