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REVENUE AND CONTRACT ASSETS - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Disaggregation of Revenue [Line Items] |  |  |  |
Franchise fees and other taxes and fees | $ 63,703 | $ 64,254 | $ 190,895 | $ 194,045
Minimum |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Contract term |  |  | 3 years |
Maximum |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Contract term |  |  | 5 years |

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