REVENUE - Contract with Customer (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Contract With Customer [Line Items]
Contract assets	$ 27,600	$ 27,600	$ 24,300
Deferred franchise and license fees
Contract liabilities:
Balance at Beginning of Period	36,896	38,011
Additions	1,341	2,783
Deductions	(2,449)	(5,006)
Balance at the End of Period	35,788	35,788
PRO Access and loyalty program points
Contract liabilities:
Balance at Beginning of Period	26,271	24,464
Additions	18,480	35,629
Deductions	(17,412)	(32,754)
Balance at the End of Period	27,339	27,339
Gift card liability
Contract liabilities:
Balance at Beginning of Period	2,641	4,172
Additions	726	1,694
Deductions	(1,166)	(3,665)
Balance at the End of Period	2,201	2,201
Franchise Fees
Contract liabilities:
Deferred revenue	35,800	35,800
Deferred revenue, expected to be recognized over next 12 months	$ 7,600	$ 7,600