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Equity-Based Compensation (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Oct. 02, 2021
Oct. 03, 2020
Sep. 28, 2019
Jan. 07, 2015
Employee Stock Purchase Plan        
Share-based Compensation Arrangement by Share-based Payment Award        
Maximum discounted purchase price of common stock as a percent of fair market value 85.00%      
2014 Long Term Incentive Plan        
Share-based Compensation Arrangement by Share-based Payment Award        
Shares authorized for the issuance       2,000,000
Class A Common Stock        
Share-based Compensation Arrangement by Share-based Payment Award        
Closing price of common stock $ 78.56      
Class B Common Stock        
Share-based Compensation Arrangement by Share-based Payment Award        
Closing price of common stock $ 77.18      
Stock Appreciation Rights (SARs)        
Share-based Compensation Arrangement by Share-based Payment Award        
Award terms 10 years      
Unvested compensation expense $ 2,511      
Unvested compensation expense weighted-average period of recognition, in years 2 years      
Vesting schedule 3 years      
Total fair value of awards vested $ 2,558 $ 2,825 $ 2,871  
Performance-based Restricted Stock Units (PSUs)        
Share-based Compensation Arrangement by Share-based Payment Award        
Unvested compensation expense $ 1,990      
Unvested compensation expense weighted-average period of recognition, in years 2 years      
Performance period for PSUs 3 years      
Vesting schedule 3 years      
Granted in period 28,442      
Weighted Average Grant Date Fair Value, Granted $ 73.39      
Vested in period 30,467      
Weighted Average Grant Date Fair Value, Vested $ 80.22      
Performance-based Restricted Stock Units (PSUs) | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award        
Performance targets for performance based units 0.00%      
Performance-based Restricted Stock Units (PSUs) | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award        
Performance targets for performance based units 200.00%      
Performance-based Restricted Stock Units (PSUs) | Class B Common Stock        
Share-based Compensation Arrangement by Share-based Payment Award        
Common stock issued for awards granted 11,500      
Time vested restricted stock units (TVA)        
Share-based Compensation Arrangement by Share-based Payment Award        
Unvested compensation expense $ 1,459      
Unvested compensation expense weighted-average period of recognition, in years 2 years      
TVA tranche vesting period start subsequent to award 1 year      
Granted in period 26,153      
Weighted Average Grant Date Fair Value, Granted $ 79.87      
Restricted Stock Awards (RSAs)        
Share-based Compensation Arrangement by Share-based Payment Award        
Granted in period 9,914      
Weighted Average Grant Date Fair Value, Granted $ 73.69      
Vested in period 9,914      
Weighted Average Grant Date Fair Value, Vested $ 73.69      
Total fair value of awards vested $ 730      
Short Term Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award        
Granted in period 45,834      
Weighted Average Grant Date Fair Value, Granted $ 86.56      
Vested in period 45,834      
Weighted Average Grant Date Fair Value, Vested $ 86.56      
Total fair value of awards vested $ 3,967