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Income Taxes (Deferred Tax Assets and Deferred Tax Liabilities) (Details) - USD ($) $ in Thousands | Sep. 29, 2019 | Sep. 30, 2018
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Income Tax Disclosure [Abstract] |  |
Accrued defined benefit pension and postretirement benefits | $ 46,918 | $ 34,776
Deferred income | 13,803 | 1,535
Impairment | 9,981 | 11,388
Accrued insurance | 7,133 | 8,994
Share-based compensation | 5,415 | 4,936
Tax loss and tax credit carryforwards | 5,327 | 7,458
Lease commitments related to closed or refranchised locations | 3,786 | 4,696
Deferred interest deduction | 3,188 | 0
Other reserves and allowances | 2,965 | 851
Accrued incentive compensation | 2,617 | 2,055
Accrued compensation expense | 1,092 | 2,034
Interest rate swaps | 0 | 181
Other, net | 868 | 2,206
Total gross deferred tax assets | 103,093 | 81,110
Valuation allowance | (2,485) | (3,554)
Total net deferred tax assets | 100,608 | 77,556
Intangible assets | (10,520) | (10,492)
Leasing transactions | (3,822) | (2,790)
Property and equipment, principally due to differences in depreciation | (128) | (1,855)
Other | (574) | (279)
Total gross deferred tax liabilities | (15,044) | (15,416)
Net deferred tax assets | $ 85,564 | $ 62,140

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