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Net Income per Common Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Oct. 03, 2015
Sep. 27, 2014
Oct. 03, 2015
Sep. 27, 2014
Net Income per Common Share [Abstract]        
Net income $ 31,854 $ 23,554 $ 71,691 $ 49,027
Basic weighted-average shares outstanding 50,945,000 53,271,000 51,654,000 53,677,000
Effect of dilutive securities 756,000 700,000 870,000 681,000
Diluted weighted-average shares outstanding 51,701,000 53,971,000 52,524,000 54,358,000
Net income per share – basic (in USD per share) $ 0.63 $ 0.44 $ 1.39 $ 0.91
Net income per share – diluted (in USD per share) $ 0.62 $ 0.44 $ 1.36 $ 0.90