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Shareholders' Equity (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Oct. 03, 2020 | Sep. 28, 2019 | Sep. 29, 2018
Class A Common Stock |  |  |
Class of Stock |  |  |
Common stock voting rights | one-tenth |  |
Minimum percentage of the board of directors to be elected by class of shares | 25.00% |  |
Class B Common Stock |  |  |
Class of Stock |  |  |
Common stock voting rights | one |  |
Common stock conversion basis | one-for-one |  |
Preferred Stock |  |  |
Class of Stock |  |  |
Preferred stock, shares authorized | 10,000,000 |  |
2014 Long Term Incentive Plan |  |  |
Class of Stock |  |  |
Number of shares authorized for awards available for grant | 1,046,786 |  |
Share Repurchase Program |  |  |
Class of Stock |  |  |
Stock repurchase program, remaining number of shares authorized to be repurchased | 166,191 |  |
Share Repurchase Program | Class A and Class B Common Stock |  |  |
Class of Stock |  |  |
Stock repurchased during period, shares | 2,881,116 | 302,184 | 328
Stock repurchased during period, value | $ 215,776 | $ 23,358 | $ 27

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