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Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |  |
Total Gain (loss) on long-lived assets held and used | $ (27,414,000) | $ (4,894,000) | $ (8,063,000)
Total Gain (loss) on goodwill | 0 | $ (900,000) |
Non-recurring basis |  |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |  |
Long-lived assets held and used | 1,178,489,000 |  |
Goodwill | 509,592,000 |  |
Franchise assets | 65,700,000 |  |
Total Gain (loss) on long-lived assets held and used | (26,604,000) |  |
Total Gain (loss) on goodwill | 0 |  |
Total Gain (loss) on franchise assets | (2,100,000) |  |
Non-recurring basis | Significant Unobservable Inputs (Level 3) as of December 31, 2018 |  |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |  |
Long-lived assets held and used | 1,178,489,000 |  |
Goodwill | 509,592,000 |  |
Franchise assets | $ 65,700,000 |  |

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- Definition Fair value portion of 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258 + Details
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