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Asset Impairments (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Assets Impairments (Textual) [Abstract] |  |  |  |  |  |  |  |
Goodwill, Impairment Loss |  |  |  |  |  |  |  | $ 55,400
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | $ 9,800 | $ 9,500 | $ 19,200 | $ 10,600 | $ 200 | $ 19,300 | $ 30,000 | 30,100
Other Asset Impairment Charges |  |  |  |  |  |  | $ 2,800 | 1,300
Pre-tax impairment charges of real estate |  |  |  |  |  | $ 200 |  |
Increase in assumed risk free rate to estimate WACC |  |  |  |  |  | 2.00% |  |
Additional franchise rights impairment charge |  |  |  |  |  | $ 51,800 |  |
Pre tax impairment charges of other long lived assets |  |  |  |  |  |  |  | $ 800
WACC increased 200 bps [Member] |  |  |  |  |  |  |  |
Assets Impairments (Textual) [Abstract] |  |  |  |  |  |  |  |
Additional franchise rights impairment charge |  |  |  |  |  | 33,200 |  |
U.S. | WACC increased 200 bps [Member] |  |  |  |  |  |  |  |
Assets Impairments (Textual) [Abstract] |  |  |  |  |  |  |  |
Additional franchise rights impairment charge |  |  |  |  |  | 33,100 |  |
U.S. | Recession scenario [Member] |  |  |  |  |  |  |  |
Assets Impairments (Textual) [Abstract] |  |  |  |  |  |  |  |
Additional franchise rights impairment charge |  |  |  |  |  | 50,998 |  |
U.K. | WACC increased 200 bps [Member] |  |  |  |  |  |  |  |
Assets Impairments (Textual) [Abstract] |  |  |  |  |  |  |  |
Additional franchise rights impairment charge |  |  |  |  |  | 100 |  |
U.K. | Recession scenario [Member] |  |  |  |  |  |  |  |
Assets Impairments (Textual) [Abstract] |  |  |  |  |  |  |  |
Additional franchise rights impairment charge |  |  |  |  |  | $ 800 |  |

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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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