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Share Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 26, 2015
Dec. 26, 2015
Dec. 27, 2014
Dec. 28, 2013
Dec. 29, 2012
Share-based Compensation Arrangement by Share-based Payment Award          
Vesting Term, Minimum   1 year      
Vesting Term   4 years      
Number of shares available for future equity awards (in shares) 4,800,000 4,800,000      
Share-based compensation   $ 19,420 $ 16,173 $ 13,893  
Blended volatility weighting percentage for historical   75.00%      
Blended volatility weighting percentage for implied   25.00%      
Shares issued as a result of vested restricted stock units (in shares)   72,000 135,000 166,000  
Repurchase of shares to satisfy tax obligations   $ (2,997) $ (4,766) $ (4,142)  
Shares of common stock issued for employee stock purchase plan (in shares)   68,000 79,000 87,000  
Stock option activity          
Exercised (in shares)   (1,117,000) (1,179,000) (2,681,000)  
Stock options, additional disclosures          
Weighted average fair value, Granted (in dollars per share)   $ 19.53 $ 15.36 $ 14.67  
Weighted average remaining contractual term, Outstanding, end of period (in years)   7 years 1 month 6 days 7 years 2 months 6 days 7 years 1 month 6 days 6 years 7 months 6 days
Weighted average remaining contractual rerm, Exercisable at end of period (in years)   5 years 9 months 24 days      
Aggregate intrinsic value, Outstanding, beginning of period   $ 146,967 $ 193,123 $ 147,229  
Aggregate intrinsic value, Outstanding, end of period $ 119,050 119,050 $ 146,967 $ 193,123 $ 147,229
Aggregate intrinsic value, Exercisable at end of period 94,598 94,598      
Restricted Stock Units (RSUs)          
Share-based Compensation Arrangement by Share-based Payment Award          
Total unrecognized compensation $ 6,500 $ 6,500      
Remaining weighted average expense recognition period (in years) 2 years 2 months 17 days        
Shares issued as a result of vested restricted stock units (in shares)   72,206 134,964 165,519  
Shares withheld to satisfy tax obligations (in shares)   35,342 77,192 78,943  
Repurchase of shares to satisfy tax obligations   $ (2,997) $ (4,766) $ (4,142)  
Restricted stock units          
Restricted, beginning of period (in shares)   277,347 413,158 603,394  
Granted (in shares)   56,052 97,817 59,864  
Exercised (in shares)   (107,548) (212,156) (244,462)  
Forfeited (in shares)   (6,234) (21,472) (5,638)  
Restricted, end of period (in shares) 219,617 219,617 277,347 413,158 603,394
Restricted stock units, additional disclosures          
Weighted average grant date fair value, Restricted, beginning of period (in dollars per share)   $ 42.64 $ 26.12 $ 18.76  
Weighted average grant date fair value, Granted (in dollars per share)   84.86 70.09 51.72  
Weighted average grant date fair value, Exercised (in dollars per share)   25.97 21.91 14.00  
Weighted average grant date fair value, Forfeited (in dollars per share)   63.57 54.54 36.24  
Weighted average grant date fair value, Restricted, end of period (in dollars per share) $ 60.99 $ 60.99 $ 42.64 $ 26.12 $ 18.76
Other information relative to restricted unit activity          
Total grant date fair value of restricted units vested and exercised   $ 2,793 $ 4,647 $ 3,422  
Total intrinsic value of restricted units vested and exercised   9,139 $ 13,205 $ 12,876  
Employee Stock Option          
Share-based Compensation Arrangement by Share-based Payment Award          
Total unrecognized compensation $ 20,500 $ 20,500      
Remaining weighted average expense recognition period (in years) 1 year 3 months        
Key assumptions in fair value determination          
Expected price volatility, minimum (in hundredths)   27.30% 28.00% 30.70%  
Expected price volatility, maximum (in hundredths)   28.80% 29.30% 35.40%  
Risk-free interest rate, minimum (in hundredths)   1.20% 1.10% 0.60%  
Risk-free interest rate, maximum (in hundredths)   1.50% 1.30% 1.20%  
Forfeiture rate, minimum (in hundredths)   6.90% 6.90% 7.00%  
Forfeiture rate, maximum (in hundredths)   6.90% 6.90% 7.00%  
Dividend yield, minimum (in hundredths)   1.00% 0.80% 0.80%  
Dividend yield, maximum (in hundredths)   1.00% 0.80% 0.80%  
Stock option expiration date (in years)   10 10 10  
Stock option activity          
Outstanding, beginning of period (in shares)   4,083,426 4,309,048 6,060,382  
Granted (in shares)   1,080,490 1,167,060 1,027,251  
Exercised (in shares)   (1,116,828) (1,179,175) (2,681,225)  
Canceled (in shares)   (185,582) (213,507) (97,360)  
Outstanding, end of period (in shares) 3,861,506 3,861,506 4,083,426 4,309,048 6,060,382
Exercisable, end of period (in shares) 1,965,084 1,965,084      
Stock options, additional disclosures          
Weighted average exercise price, Outstanding, beginning of period (in dollars per share)   $ 41.93 $ 30.72 $ 19.48  
Weighted average exercise price, Granted (in dollars per share)   83.70 64.08 51.87  
Weighted average exercise price, Exercised (in dollars per share)   33.11 20.15 12.95  
Weighted average exercise price, Cancelled (in dollars per share)   67.28 57.14 43.27  
Weighted average exercise price, Outstanding, end of period (in dollars per share) $ 54.95 54.95 $ 41.93 $ 30.72 $ 19.48
Weighted average exercise price, Exercisable, end of period (in dollars per share) $ 37.53 $ 37.53      
Other information relative to option activity          
Total fair value of stock options vested   $ 13,207 $ 10,855 $ 10,535  
Total intrinsic value of stock options exercised   $ 60,082 $ 60,656 $ 122,621  
Employee Stock Option | Minimum          
Key assumptions in fair value determination          
Weighted average expected lives (in years)   4 years 6 months 4 years 6 months 4 years 8 months 24 days  
Employee Stock Option | Maximum          
Key assumptions in fair value determination          
Weighted average expected lives (in years)   4 years 6 months 4 years 6 months 4 years 8 months 24 days  
Employee Stock Purchase Plan          
Share-based Compensation Arrangement by Share-based Payment Award          
Share-based compensation   $ 1,100 $ 1,000 $ 900  
Discount rate of employee stock purchase plan (in hundredths)   15.00%      
Shares of common stock issued for employee stock purchase plan (in shares)   68,428 78,670 86,555  
Shares of common stock reserved for future issuance under the ESPP (in shares) 12,200,000 12,200,000      
Employee Stock Purchase Plan | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award          
Shares of common stock reserved for future issuance under the ESPP (in shares) 16,000,000 16,000,000