REVENUE - Balances from Contract with Customer (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Contract With Customer [Line Items]
Contract assets	$ 27,900	$ 24,300
Deferred franchise and license fees
Contract liabilities:
Balance at Beginning of Period	38,011
Deductions	(7,739)
Balance at the End of Period	34,400
Contract With Customer, Liability, Additions, Net Of Revenue Recognized	4,128
PRO Access and loyalty program points
Contract liabilities:
Balance at Beginning of Period	24,464
Deductions	(22,942)
Balance at the End of Period	26,034
Contract With Customer, Liability, Additions, Net Of Revenue Recognized	24,512
Gift card liability
Contract liabilities:
Balance at Beginning of Period	4,172
Deductions	(2,430)
Balance at the End of Period	1,901
Contract With Customer, Liability, Additions, Net Of Revenue Recognized	159
Franchise Fees
Contract liabilities:
Balance at the End of Period	34,400
Deferred revenue	$ 7,200