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Financing Obligations - Narrative (Details) $ in Millions |  | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 10, 2017 USD ($) property period | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Dec. 31, 2018 USD ($) property
Leases [Abstract] |  |  |  |
Sale leaseback transaction, number of properties | property | 42 |  |  | 2
Sale leaseback transaction, gross proceeds | $ | $ 119.5 | $ 4.7 | $ 0.0 | $ 6.4
Sale leaseback transaction, lease term (in years) | 20 years |  |  |
Sale leaseback transaction, number of additional periods | period | 5 |  |  |
Sale Leaseback Transaction, Length Of Each Additional Period |  | 5 years |  |

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- Definition Sale Leaseback Transaction, Length Of Each Additional Period + References No definition available. + Details
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- Definition Sale Leaseback Transaction, Number of Properties + References No definition available. + Details
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- Definition Sale Leaseback Transaction, Renewal Term, Number of Additional Terms + References No definition available. + Details
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- References No definition available. + Details
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- Definition Amount of cash inflow before closing and debt issuance costs received by a seller-lessee in a sale-leaseback recognized in financing activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 51 -URI http://asc.fasb.org/extlink&oid=82846721&loc=d3e51840-112757 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=82846721&loc=d3e51831-112757 Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=82846721&loc=d3e51843-112757 + Details
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