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INCOME TAXES (Details) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2018
Apr. 01, 2017
Dec. 31, 2017
Uncertain Tax Benefits      
Gross unrecognized tax benefits $ 29,000,000    
Net unrecognized tax benefits 20,300,000    
Net unrecognized tax benefits that would impact effective tax rate if recognized 16,600,000    
Gross accrued interest 4,200,000    
Net accrued interest 3,200,000    
Penalties recorded 0    
Other Tax Matters      
Income tax provision (4,100,000) $ (3,200,000)  
Pre-tax income (loss) from continuing operations $ 16,500,000 $ 13,500,000  
Effective income tax rate (as a percent) 24.80% 23.70%  
Tax charges related to the Tax Cuts and Jobs Act of 2017 $ 1.5    
Excess tax benefits resulting from stock-based compensation 0.8    
Tax Cuts and Jobs Act of 2017, provisional charges     $ 0
Accounting Standards Update 2016-09      
Other Tax Matters      
Benefit for excess tax benefits related to stock compensation awards   $ 1,000,000  
Minimum      
Uncertain Tax Benefits      
Reasonably possible amount that unrecognized tax benefits could decrease within next 12 months, high end of range 3,000,000    
Maximum      
Uncertain Tax Benefits      
Reasonably possible amount that unrecognized tax benefits could decrease within next 12 months, high end of range $ 15,000,000    
Foreign      
Other Tax Matters      
Foreign losses generated for which no tax benefit was recognized   $ 5,000,000