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Amounts Recognized in Consolidated Financial Statements with Respect to Stock Based Compensation Plan (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 25, 2012
Jun. 27, 2011
Jun. 25, 2012
Jun. 27, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense recognized $ 2,783 $ 2,124 $ 4,988 $ 3,879
Income tax benefit recognized (691) (584) (1,270) (1,118)
Total stock-based compensation expense after income taxes 2,092 1,540 3,718 2,761
Cost Of Goods Sold
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense recognized 265 254 576 471
Selling And Marketing
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense recognized 118 100 232 211
General And Administrative
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense recognized $ 2,400 $ 1,770 $ 4,180 $ 3,197