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Segment Information (Sales And Operating Profit By Segment And Reconciliation Of Segment Operating Profit To Earnings Before Income Taxes) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Net sales:    
Net sales $ 627,535 $ 589,670
Operating profit:    
Operating profit 66,303 52,362
Deductions from operating profit:    
Interest expense 8,646 8,486
Equity-based compensation expense 2,001 2,168
Corporate expenses and other, net 7,822 5,220
Earnings before income taxes 47,834 36,488
Aircraft Controls    
Net sales:    
Net sales 278,534 268,450
Operating profit:    
Operating profit 30,768 23,111
Space And Defense Controls    
Net sales:    
Net sales 133,393 122,590
Operating profit:    
Operating profit 16,289 9,088
Industrial Systems    
Net sales:    
Net sales 215,608 198,630
Operating profit:    
Operating profit $ 19,246 $ 20,163