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Equity-Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Sep. 28, 2024 | Sep. 30, 2023 | Oct. 01, 2022
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 | $ 200.80 |  |
Class B Common Stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Closing price of common stock | $ 198.29 |  |
Performance-based Restricted Stock Units (PSUs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Unvested compensation expense | $ 4,511 |  |
Unvested compensation expense weighted-average period of recognition, in years | 2 years |  |
Performance period for PSUs | 3 years |  |
Vesting schedule | 3 years |  |
Common stock issued for awards granted | 40,900 |  |
Granted in period | 40,388 |  |
Weighted Average Grant Date Fair Value, Granted | $ 126.20 |  |
Vested in period | 29,418 |  |
Weighted Average Grant Date Fair Value, Vested | $ 84.23 |  |
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% |  |
Time vested restricted stock units (TVA) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Unvested compensation expense | $ 4,865 |  |
TVA tranche vesting period start subsequent to award | 1 year |  |
Unvested compensation expense weighted-average period of recognition, in years | 2 years |  |
Common stock issued for awards granted | 13,900 |  |
Granted in period | 40,353 |  |
Weighted Average Grant Date Fair Value, Granted | $ 127.96 |  |
Vested in period | 20,396 |  |
Weighted Average Grant Date Fair Value, Vested | $ 126.20 |  |
Restricted Stock Awards (RSAs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Granted in period | 9,117 |  |
Weighted Average Grant Date Fair Value, Granted | $ 126.20 |  |
Vested in period | 9,117 |  |
Weighted Average Grant Date Fair Value, Vested | $ 126.20 |  |
Total fair value of awards vested | $ 1,151 |  |
Stock Appreciation Rights (SARs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
SARs, Granted | 0 |  |
Award terms | 10 years |  |
Unvested compensation expense | $ 92 |  |
Unvested compensation expense weighted-average period of recognition, in years | 1 year |  |
Vesting schedule | 3 years |  |
Total fair value of awards vested | $ 1,511 | $ 2,426 | $ 2,346

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