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INCENTIVE COMPENSATION (Schedule of Compensation Cost and Income Tax Benefit) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 25, 2017
Jun. 26, 2016
Jun. 25, 2017
Jun. 26, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total share-based compensation costs $ 487 $ 989 $ 1,947 $ 1,869
Income tax benefit 184 293 601 550
Cost of goods sold        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total share-based compensation costs 38 162 187 261
Selling, general and administrative expenses        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total share-based compensation costs $ 449 $ 827 $ 1,760 $ 1,608