Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Stock Options (Details)

v3.19.3.a.u2
Stockholders' Equity - Stock Options (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 26, 2019
Dec. 27, 2018
Dec. 28, 2017
Feb. 28, 2019
Sep. 14, 2018
May 29, 2018
Nov. 20, 2017
Jul. 25, 2017
May 02, 2017
Dec. 29, 2016
Options                    
Outstanding at the beginning of period 9,852,828 11,254,086 11,979,111              
Granted 157,904 926,775 1,339,668              
Exercised (3,740,749) (2,069,195) (1,828,339)              
Forfeited or expired (232,904) (258,838) (236,354)              
Outstanding at the end of period 6,037,079 9,852,828 11,254,086              
Weighted Average Exercise Price                    
Outstanding at the beginning of period $ 10.11 $ 7.28 $ 5.34              
Granted 42.42 34.07 21.68              
Exercised 5.03 5.09 4.85              
Forfeited or expired 21.97 13.12 9.17              
Outstanding at the end of period $ 13.64 $ 10.11 $ 7.28              
Additional Disclosures                    
Options Exercisable at End of Year 3,673,657 6,409,257 7,448,532             8,151,056
Weighted Average Exercise Price of Exercisable Options $ 8.25 $ 5.21 $ 4.52             $ 4.20
Weighted Average Fair Value/Share of Options Granted During the Year 20.38 $ 15.63 $ 9.20              
Share price $ 50.30     $ 37.50 $ 37.25 $ 45.80 $ 36.00 $ 40.00 $ 21.00  
Options exercised, intrinsic value $ 146,625 $ 87,151                
Options outstanding, aggregate intrinsic value $ 221,303                  
Options outstanding, weighted-average remaining contractual life 5 years 4 months 24 days                  
Options exercisable, aggregate intrinsic value $ 154,483                  
Options exercisable, weighted-average remaining contractual life 4 years                  
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% 3.05% 2.06%              
Expected volatility 45.00% 42.00% 39.00%              
Expected life (in years) 6 years 8 months 4 days 6 years 3 months 14 days 6 years 6 months              
Dividend yield 0.00%                  
Additional Disclosures                    
Unrecognized compensation cost amount $ 19,126                  
Unrecognized compensation cost period for recognition 2 years 8 months 12 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 1 year