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COMPENSATION PLANS (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 01, 2016
Sep. 26, 2015
Oct. 01, 2016
Sep. 26, 2015
Jul. 02, 2016
Apr. 30, 2007
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock-based compensation $ 800 $ 1,100 $ 2,213 $ 3,442    
Stock Incentive Plan 2007 [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares reserved for future issuance           2,550,000
Shares available for future grants 471,000   471,000      
Restricted Stock Units (RSUs) [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period     3 years      
Restricted stock units issued     72,148      
Total compensation costs         $ 4,000  
Compensation expense recognized $ 800 $ 1,100 $ 2,200 $ 3,400    
Restricted Stock Units (RSUs) [Member] | Minimum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period     3 years      
Restricted Stock Units (RSUs) [Member] | Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period     5 years