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STOCKHOLDERS' EQUITY (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 30, 2019
Mar. 31, 2018
Stockholders' Equity Note [Abstract]    
Authorizations remaining $ 30,000  
Payments to noncontrolling interests 947 $ 1,547
Present value of purchase price 1,600  
Variable consideration in accrued expenses 700  
Variable consideration in other long-term liabilities $ 900