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INCENTIVE COMPENSATION (Schedule of Compensation Cost and Income Tax Benefit) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 26, 2017
Mar. 27, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total share-based compensation costs $ 1,460 $ 880
Income tax benefit 417 257
Cost of goods sold    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total share-based compensation costs 149 99
Selling, general and administrative expenses    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total share-based compensation costs $ 1,311 $ 781