Income Taxes (Deferred Tax Assets and Deferred Tax Liabilities) (Details) - USD ($) $ in Thousands	Oct. 03, 2021	Sep. 27, 2020
Deferred tax assets:
Operating and finance lease liabilities	$ 237,509	$ 234,926
Accrued defined benefit pension and postretirement benefits	28,837	44,436
Deferred income	12,083	12,921
Impairment	6,957	8,895
Accrued insurance	5,389	6,500
Other reserves and allowances	4,050	2,440
Share-based compensation	4,039	4,143
Accrued incentive compensation	3,455	2,585
Tax loss and tax credit carryforwards	3,129	4,273
Accrued compensation expense	710	672
Other, net	3,424	2,364
Total gross deferred tax assets	309,582	324,155
Valuation allowance	(1,349)	(2,104)
Total net deferred tax assets	308,233	322,051
Deferred tax liabilities:
Operating and finance lease ROU assets	(242,038)	(235,373)
Intangible assets	(11,349)	(11,437)
Property and equipment, principally due to differences in depreciation	(1,036)	(1,781)
Other	(2,293)	(1,138)
Total gross deferred tax liabilities	(256,716)	(249,729)
Net deferred tax assets	$ 51,517	$ 72,322