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Note 9 - Postretirement and Postemployment Benefits - Amounts Recognized in the Consolidated Balance Sheets (Details) - USD ($)
$ in Thousands
Sep. 26, 2021
Sep. 27, 2020
Accumulated other comprehensive income (before income tax benefit) $ 36,965 $ (41,344)
Other Postretirement Benefits Plan [Member]    
Assets for Plan Benefits, Defined Benefit Plan 17,664 15,241
Postretirement benefit obligations (9,859) (37,172)
Accumulated other comprehensive income (before income tax benefit) $ 17,747 $ 14,269