REVENUE - International Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Revenue	$ 617,944	$ 650,238	$ 1,225,477	$ 1,305,186
Operating Segment
Disaggregation of Revenue [Line Items]
Revenue	683,182	683,624	1,355,378	1,377,128
Operating Segment | International
Disaggregation of Revenue [Line Items]
Revenue	48,635	43,813	88,700	83,564
Operating Segment | International | Wholesale sales to franchisees
Disaggregation of Revenue [Line Items]
Revenue	27,185	26,250	48,945	51,806
Operating Segment | International | Royalties and franchise fees
Disaggregation of Revenue [Line Items]
Revenue	6,576	6,280	13,197	12,851
Operating Segment | International | Other
Disaggregation of Revenue [Line Items]
Revenue	$ 14,874	$ 11,283	$ 26,558	$ 18,907