Debt - Schedule of Aggregate Maturities of Our Total Future Value and Present value of the Minimum Capital Lease Payments and Payments Related to Sale-leaseback (Details) $ in Thousands	Dec. 31, 2017 USD ($)
Future Value of Payments
2018	$ 36,699
2019	59,128
2020	36,201
2021	41,314
2022	45,332
Thereafter	211,670
Total	430,344
Interest
2018	29,049
2019	28,082
2020	26,780
2021	24,900
2022	22,558
Thereafter	64,619
Total	195,988
Present Value of Payments
2018	7,650
2019	31,046
2020	9,421
2021	16,414
2022	22,774
Thereafter	147,051
Total	$ 234,356

Capital Leases, Future Minimum Payments Due In Five Years, Present Value Of Net Minimum Payments

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Capital Leases, Future Minimum Payments Due In Four Years, Present Value Of Net Minimum Payments

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Capital Leases, Future Minimum Payments Due, Next Twelve Months, Present Value Of Net Minimum Payments

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Amount of minimum lease payments for capital leases.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737

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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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