Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Stock Options (Details)

v3.10.0.1
Stockholders' Equity - Stock Options (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 27, 2018
Dec. 28, 2017
Dec. 29, 2016
Sep. 14, 2018
May 29, 2018
Nov. 20, 2017
Jul. 25, 2017
May 02, 2017
Dec. 31, 2015
Options                  
Outstanding at the beginning of period 11,254,086 11,979,111 10,460,119            
Granted 926,775 1,339,668 2,025,535            
Exercised (2,069,195) (1,828,339) (145,140)            
Forfeited or expired (258,838) (236,354) (361,403)            
Outstanding at the end of period 9,852,828 11,254,086 11,979,111            
Weighted Average Exercise Price                  
Outstanding at the beginning of period $ 7.28 $ 5.34 $ 4.77            
Granted 34.07 21.68 9.94            
Exercised 5.09 4.85 3.48            
Forfeited or expired 13.12 9.17 6.65            
Outstanding at the end of period $ 10.11 $ 7.28 $ 5.34            
Additional Disclosures                  
Options Exercisable at End of Year 6,409,257 7,448,532 8,151,056           6,656,524
Weighted Average Exercise Price of Exercisable Options $ 5.21 $ 4.52 $ 4.20           $ 4.00
Weighted Average Fair Value/Share of Options Granted During the Year 15.63 $ 9.20 $ 4.13            
Share price $ 26.01     $ 37.250 $ 45.80 $ 36.00 $ 40.00 $ 21.00  
Options exercised, intrinsic value $ 87,151 $ 62,508              
Options outstanding, aggregate intrinsic value $ 165,404                
Options outstanding, weighted-average remaining contractual life 5 years 3 months 18 days                
Options exercisable, aggregate intrinsic value $ 133,485                
Options exercisable, weighted-average remaining contractual life 3 years 9 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 3.05% 2.06% 1.43%            
Expected volatility 42.00% 39.00% 40.00%            
Expected life (in years) 6 years 3 months 15 days 6 years 6 months 6 years 6 months            
Additional Disclosures                  
Unrecognized compensation cost amount $ 26,135                
Unrecognized compensation cost period for recognition 3 years 6 months                
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 1 year