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Acquisitions and Divestitures (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Nov. 28, 2019
Dec. 28, 2019
Dec. 29, 2018
Oct. 03, 2020
Sep. 28, 2019
Sep. 29, 2018
Business Acquisitions and Divestitures            
Net cash paid to acquire a business       $ 54,265 $ 0 $ 48,382
GAT, Inc.            
Business Acquisitions and Divestitures            
Net cash paid to acquire a business $ 54,265          
Industrial Systems            
Business Acquisitions and Divestitures            
Proceeds from divestiture of businesses   $ 1,775 $ 4,191      
Industrial Systems | Other Income            
Business Acquisitions and Divestitures            
Gain Loss on Divestiture   $ 169 $ 2,641