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Employee Pension and Profit Sharing Plans - Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets (Details) - USD ($) $ in Thousands | Sep. 27, 2019 | Sep. 28, 2018
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Retirement Benefits [Abstract] |  |
Projected benefit obligation | $ 10,699 | $ 16,081
Accumulated benefit obligation | $ 10,506 | $ 15,935

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