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STOCKHOLDERS' EQUITY (Details) - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended
Jun. 29, 2019
Jun. 30, 2018
Dec. 29, 2018
Dec. 30, 2017
Stockholders' Equity Note [Abstract]        
Common stock, shares authorized (in shares) 100,000,000   100,000,000  
Common stock, par value (in dollars per share) $ 0.01   $ 0.01000  
Common stock, shares issued (in shares) 50,453,351   49,517,817 49,518,000
Common stock, shares outstanding (in shares) 50,453,351   49,517,817 49,518,000
Preferred stock, shares authorized (in shares) 1,000,000   1,000,000  
Preferred stock, par value (in dollars per share) $ 0.01   $ 0.01000  
Preferred stock, shares issued (in shares) 0   0  
Authorizations remaining $ 30,000      
Payments to noncontrolling interests 1,045 $ 1,547    
Present value of purchase price 1,800      
Variable consideration in accrued expenses 900      
Variable consideration in other long-term liabilities $ 900      
Preferred Stock, Shares Outstanding 0   0