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Share-based Compensation (Details 3) (RSUs, USD $)
3 Months Ended
Apr. 01, 2014
Mar. 26, 2013
Share-based compensation    
Unrecognized compensation cost of unvested stock awards (in dollars) $ 11,500,000  
Expected weighted-average period of recognition of unrecognized compensation cost of unvested awards 1 year 3 months 18 days  
Intrinsic value of awards vested (in dollars) 11,500,000 9,900,000
Restricted Stock Units, Shares    
Outstanding at the beginning of the period (in shares) 1,283,862  
Granted (in shares) 137,743  
Forfeited (in shares) (28,418)  
Vested (in shares) (429,792)  
Outstanding at the end of period (in shares) 963,395  
Restricted Stock Units, Weighted-Average Grant Date Fair Value    
Outstanding at the beginning of the period (in dollars per share) $ 18.68  
Granted (in dollars per share) $ 26.29  
Forfeited (in dollars per share) $ 17.04  
Vested (in dollars per share) $ 16.16  
Outstanding at the end of the period (in dollars per share) $ 20.94  
Weighted-Average Remaining Contractual Term (years)    
Weighted-Average Remaining Contractual Term 8 years 8 months 1 day  
Aggregate Intrinsic Value    
Outstanding at the end of the period (in dollars) $ 25,703,000  
Minimum
   
Share-based compensation    
Vesting period 1 year  
Maximum
   
Share-based compensation    
Vesting period 5 years