Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Stock Options (Details)

v3.8.0.1
Stockholders' Equity - Stock Options (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 28, 2017
Dec. 29, 2016
Dec. 31, 2015
Nov. 16, 2017
Jul. 25, 2017
May 02, 2017
Dec. 25, 2014
Options              
Outstanding at the beginning of period 11,979,111 10,460,119 9,524,266        
Granted 1,339,668 2,025,535 1,378,355        
Exercised (1,828,339) (145,140) (5,149)        
Forfeited or expired (236,354) (361,403) (437,353)        
Outstanding at the end of period 11,254,086 11,979,111 10,460,119        
Weighted Average Exercise Price              
Outstanding at the beginning of period $ 5.34 $ 4.77 $ 4.40        
Granted 21.68 9.94 8.07        
Exercised 4.85 3.48 7.69        
Forfeited or expired 9.17 6.65 7.16        
Outstanding at the end of period $ 7.28 $ 5.34 $ 4.77        
Additional Disclosures              
Options Exercisable at End of Year 7,448,532 8,151,056 6,656,524       4,608,462
Weighted Average Exercise Price of Exercisable Options $ 4.52 $ 4.20 $ 4.00       $ 3.85
Weighted Average Fair Value/Share of Options Granted During the Year 9.20 $ 4.13 $ 4.12        
Share price $ 49.59     $ 36.00 $ 40.00 $ 21.00  
Options exercised, intrinsic value $ 62,508 $ 942          
Options outstanding, aggregate intrinsic value $ 476,162            
Options outstanding, weighted-average remaining contractual life 5 years 8 months 12 days            
Options exercisable, aggregate intrinsic value $ 335,737            
Options exercisable, weighted-average remaining contractual life 4 years 3 months 18 days            
Stock options              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Contractual term 10 years            
Fair Value Assumptions              
Risk free interest rate 2.06% 1.43% 1.93%        
Expected volatility 39.00% 40.00% 49.00%        
Expected life (in years) 6 years 6 months 6 years 6 months 6 years 11 months 1 day        
Additional Disclosures              
Unrecognized compensation cost amount $ 19,105            
Unrecognized compensation cost period for recognition 3 years 9 months 18 days            
Stock options | Maximum              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Period of vesting provision 5 years            
Stock options | Minimum              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Period of vesting provision 3 years