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Share-based Compensation (Details 3) (RSUs, USD $)
 3 Months Ended 6 Months Ended
Jul. 01, 2014
Jun. 25, 2013
Jul. 01, 2014
Jun. 25, 2013
Restricted Stock Units, Shares        
Outstanding at the beginning of the period (in shares)     1,283,862  
Granted (in shares)     278,816  
Forfeited (in shares)     (40,880)  
Vested (in shares)     (536,501)  
Outstanding at the end of period (in shares) 985,297   985,297  
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)     $ 25.27  
Forfeited (in dollars per share)     $ 18.37  
Vested (in dollars per share)     $ 17.37  
Outstanding at the end of the period (in dollars per share) $ 21.27   $ 21.27  
Weighted-Average Remaining Contractual Term (years)        
Weighted-Average Remaining Contractual Term     8 years 7 months 10 days  
Aggregate Intrinsic Value        
Outstanding at the end of the period (in dollars) $ 25,963,000   $ 25,963,000  
Unrecognized compensation cost of unvested stock awards (in dollars) 10,900,000   10,900,000  
Expected weighted-average period of recognition of unrecognized compensation cost of unvested awards     1 year 4 months 24 days  
Intrinsic value of awards vested (in dollars) $ 2,700,000 $ 3,300,000 $ 14,200,000 $ 13,200,000
Minimum
        
Aggregate Intrinsic Value        
Vesting period     1 year  
Maximum
        
Aggregate Intrinsic Value        
Vesting period     5 years