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NATURE OF OPERATIONS - Secondary Offering (Details) - $ / shares
 1 Months Ended 4 Months Ended 12 Months Ended
Feb. 04, 2015
Aug. 31, 2015
Dec. 30, 2015
Dec. 28, 2016
Dec. 30, 2015
Class of Stock [Line Items]          
Units acquired during the period (shares) 5,968,841   2,848,035 5,207,149 6,003,308
Ownership percent of noncontrolling interest 33.30%   54.60% 69.10% 54.60%
Noncontrolling owners ownership percentage 66.70%   45.40% 30.90% 45.40%
Class A Common Stock | Common stock          
Class of Stock [Line Items]          
Redemptions (shares)     2,848,035 5,207,149  
Class B Common Stock | Common stock          
Class of Stock [Line Items]          
Effect of redemption (shares) 5,968,841   2,848,035 5,207,149  
Secondary offering          
Class of Stock [Line Items]          
Units acquired during the period (shares)   3,155,273      
Secondary offering | Class A Common Stock | Common stock          
Class of Stock [Line Items]          
Total shares offered   4,000,000      
Shares issued, share price (in dollars per share)   $ 60      
Conversion of units from former equity owners (shares)   844,727      
Redemptions (shares)   3,155,273      
Secondary offering | Class B Common Stock | Common stock          
Class of Stock [Line Items]          
Effect of redemption (shares)   3,155,273      
Limited Liability Company          
Class of Stock [Line Items]          
Number of units redeemed (shares)     2,848,035 5,207,149  
Limited Liability Company | Secondary offering          
Class of Stock [Line Items]          
Number of units redeemed (shares)   3,155,273