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Equity-Based Compensation (Schedule of Compensation Cost By Award Type) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 28, 2019 | Sep. 29, 2018 | Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Total compensation cost before income taxes | $ 6,464 | $ 5,804 | $ 4,582
Income tax benefit | 1,024 | 1,136 | 1,567
Stock appreciation rights |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Total compensation cost before income taxes | 2,594 | 2,617 | 3,045
Performance-based restricted stock units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Total compensation cost before income taxes | 2,048 | 1,650 | 978
Restricted stock awards |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Total compensation cost before income taxes | 480 | 480 | 480
Stock options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Total compensation cost before income taxes | 0 | 0 | 5
Employee stock purchase plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Total compensation cost before income taxes | $ 1,342 | $ 1,057 | $ 74

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