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INCOME TAXES (Details) - USD ($)
 3 Months Ended
Mar. 28, 2020
Mar. 30, 2019
Uncertain Tax Benefits    
Gross unrecognized tax benefits $ 17,200,000  
Net unrecognized tax benefits 13,900,000  
Net unrecognized tax benefits that would impact effective tax rate if recognized 9,800,000  
Gross accrued interest 4,300,000  
Net accrued interest 3,400,000  
Penalties accrued 0  
Other Tax Matters    
Income tax provision 6,000,000.0 $ 4,600,000
Pre-tax income (loss) from continuing operations $ 28,700,000 $ 5,200,000
Effective income tax rate (as a percent) 20.90% 88.50%
Excess tax benefits from stock-based compensation awards vested $ (1,200,000) $ (1,200,000)
Maximum    
Uncertain Tax Benefits    
Reasonably possible amount that unrecognized tax benefits could decrease within next 12 months, high end of range $ 10,000,000.0