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Stock Options Plans and Stock-Based Compensation (Details 1) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Jan. 02, 2016
Dec. 27, 2014
Dec. 28, 2013
Summary of stock option plan activity      
Number of Shares, Beginning Balance 1,473,320 1,770,375 2,503,667
Weighted Average Exercise Price, Beginning Balance $ 22.89 $ 19.89 $ 18.27
Number of Shares, Granted 323,104 233,181 293,325
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price $ 32.58 $ 37.10 $ 24.60
Number of Shares, Exercised (390,085) (486,252) (840,951)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price $ 16.57 $ 18.39 $ 16.21
Number of Shares, Canceled (118,789) (43,984) (185,666)
Number of Shares, Ending Balance 1,287,550 1,473,320 1,770,375
Weighted Average Exercise Price, Ending Balance $ 26.73 $ 22.89 $ 19.89
Weighted Average Remaining Contractual Term, Ending Balance 4 years    
Aggregate Intrinsic Value, Ending Balance [1] $ 11.6    
Number of Shares, Vested and expected to vest 1,230,537    
Weighted Average Exercise Price, Vested and expected to vest $ 26.45    
Weighted Average Remaining Contractual Term, Vested and expected to vest 3 years 10 months 25 days    
Aggregate Intrinsic Value, Vested and expected to vest [1] $ 11.4    
Number of Shares, Exercisable 768,184    
Weighted Average Exercise Price, Exercisable $ 23.18    
Weighted Average Remaining Contractual Term, Exercisable 2 years 8 months 27 days    
Aggregate Intrinsic Value, Exercisable [1] $ 9.6    
Share based compensation arrangement shares available for grant 2,484,296    
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price $ 28.41 $ 27.17 $ 22.16
[1] The aggregate intrinsic value on the table was calculated based upon the positive difference between the closing market value of the Company’s stock on January 2, 2016 of $35.40 and the exercise price of the underlying option.