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