BASIS OF PRESENTATION AND OPINION OF MANAGEMENT (Details)	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jun. 25, 2016	Jul. 01, 2017	Jun. 25, 2016
Basis of presentation and opinion of management
Length of fiscal quarters	91 days	91 days	182 days	182 days
Minimum
Basis of presentation and opinion of management
Length of fiscal years			364 days
Maximum
Basis of presentation and opinion of management
Length of fiscal years			371 days