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Shareholders' Equity (Deficit): Stock Options Activity (Details) - Stock options - USD ($)
 6 Months Ended 12 Months Ended
Jun. 25, 2022
Jun. 26, 2021
Dec. 25, 2021
Number of Shares      
Outstanding at the beginning of the period (in shares) 355,621    
Granted (in shares) 34,940    
Exercised (in shares) (22,280)    
Forfeited (in shares) (6,501)    
Outstanding at the end of the period (in shares) 361,780   355,621
Exercisable at the end of the period (in shares) 220,496    
Weighted Average Exercise Price      
Outstanding at the beginning of the period (in dollars per share) $ 146.03    
Granted (in dollars per share) 198.42    
Exercised (in dollars per share) 114.62    
Forfeited (in dollars per share) 183.28    
Outstanding at the end of the period (in dollars per share) 152.35   $ 146.03
Exercisable at the end of the period (in dollars per share) $ 119.50    
Weighted Average Remaining Contractual Life (years)      
Outstanding 6 years 3 months 3 days   6 years 3 months 25 days
Exercisable at the end of the period 4 years 7 months 2 days    
Intrinsic Value      
Outstanding at the beginning of the period $ 39,320,600    
Outstanding at the end of the period 20,285,200   $ 39,320,600
Exercisable at the end of the period $ 18,323,800    
Weighted average assumptions and results used in estimation of fair value of options granted      
Risk free interest rate (as a percent) 2.70% 0.90%  
Expected life (years) 6 years 6 years  
Expected volatility (as a percent) 27.47% 25.07%  
Dividend yield (as a percent) 4.61% 2.74%  
Option fair value (in dollars per share) $ 33.38 $ 32.70