Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Narrative (Details)

v3.20.4
Stock-Based Compensation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 26, 2020
Dec. 28, 2019
Dec. 29, 2018
Jul. 28, 2020
Jul. 29, 2019
Aug. 10, 2018
Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares authorized       94,195 84,008 50,000 44,021
Dividend yield 0.00%            
Expected volatility 31.50%            
Expected term 6 years 3 months            
Fair value of option (in dollars per share) $ 335.46            
Unrecognized compensation expense $ 12,247            
Unrecognized compensation expense, recognition period 3 years 6 months            
Minimum              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Risk-free interest rate 0.40%            
Maximum              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Risk-free interest rate 1.81%            
Stock Options              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares outstanding 77,392 81,700          
Stock compensation expense $ 3,960 $ 2,312 $ 1,590        
Time Based Vesting              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares outstanding 61,310            
Performance Based Stock Option              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares outstanding 16,082            
Restricted Stock              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock compensation expense $ 1,165 $ 669 $ 0        
Restricted stock outstanding (in shares) 1,071            
Restriction lapse period 3 years            
Unvested restricted stock (in shares) 1,071 2,143          
Weighted average grant date fair value (in dollars per share) $ 0            
Granted (in shares) 0