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Property and Equipment - Textual (Details) $ in Millions | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Feb. 28, 2016 | Dec. 31, 2017 USD ($) transaction | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Feb. 29, 2016 renewal_option
Property, Plant and Equipment [Line Items] |  |  |  |  |
Percentage of property and equipment, net pledged to lenders under credit agreement (percent) |  | 72.00% |  |  |
Financing obligation liability |  | $ 271.5 | $ 279.3 |  |
Estimate of total financing obligation liability |  | 884.9 |  |  |
Rental income from subleases |  | 2.9 | 4.1 | $ 5.0 |
Total expected future minimum rentals |  | $ 0.8 |  |  |
Number of sale/leaseback transactions | transaction |  | 2 |  |  |
Future minimum payments under lease back transaction, due 2018 |  | $ 2.7 |  |  |
Future minimum payments under lease back transaction, due 2019 |  | 2.7 |  |  |
Future minimum payments under lease back transaction, due 2020 |  | 2.7 |  |  |
Future minimum payments under lease back transaction, due 2021 |  | 2.5 |  |  |
Future minimum payments under lease back transaction, due thereafter |  | $ 3.2 |  |  |
Minimum [Member] |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Lease term |  | 1 year |  |  |
Maximum [Member] |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Lease term |  | 15 years |  |  |
Development / Lease Agreement [Member] |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Lease term | 15 years |  |  |  |
Number of lease renewal options available | renewal_option |  |  |  |  | 4
Term of lease renewal options | 5 years |  |  |  |
Increase in Property and equipment, net |  | $ 49.8 | 20.3 |  |
Financing Obligation [Member] | Development / Lease Agreement [Member] |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Estimate of total financing obligation liability |  | 56.0 |  |  |
Long-term Debt, Net of Current Portions [Member] | Development / Lease Agreement [Member] |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Financing obligation liability |  | 49.5 | $ 20.3 |  |
Financing obligation liability, current |  | $ 0.3 |  |  |

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- Definition Total number of sale/leaseback transactions in which the Company is involved as of the balance sheet date. + References No definition available. + Details
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- Definition 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. + References 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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