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Leases Leases - Additional Information (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Lessee, Lease, Description [Line Items] |  |
Finance Lease, Right-of-Use Asset | $ 233,209 | $ 367,164
Finance Lease Accumulated Depreciation | $ 9,972 | $ 131,971
Minimum |  |
Lessee, Lease, Description [Line Items] |  |
Lessee, Operating Lease, Term of Contract | 5 years |
Lessee, Operating Lease, Renewal Term | 5 years |
Maximum |  |
Lessee, Lease, Description [Line Items] |  |
Lessee, Operating Lease, Term of Contract | 15 years |
Lessee, Operating Lease, Renewal Term | 10 years |

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- Definition Finance Lease Accumulated Depreciation, contra asset. + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Amount of lessee's right to use underlying asset under finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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Namespace Prefix: | us-gaap_
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- Details
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- Details
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