Segment Information (Segment Sales By Market Type) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Segment Reporting Information
Net sales	$ 754,843	$ 679,676
Aircraft Controls
Segment Reporting Information
Net sales	339,954	304,045
Aircraft Controls | Military
Segment Reporting Information
Net sales	173,694	146,801
Aircraft Controls | Commercial
Segment Reporting Information
Net sales	166,260	157,244
Space And Defense Controls
Segment Reporting Information
Net sales	186,240	156,068
Space And Defense Controls | Space
Segment Reporting Information
Net sales	62,740	50,176
Space And Defense Controls | Defense
Segment Reporting Information
Net sales	123,500	105,892
Industrial Systems
Segment Reporting Information
Net sales	228,649	219,563
Industrial Systems | Energy
Segment Reporting Information
Net sales	29,939	29,297
Industrial Systems | Industrial Automation
Segment Reporting Information
Net sales	106,831	109,130
Industrial Systems | Simulation and Test
Segment Reporting Information
Net sales	28,468	29,050
Industrial Systems | Medical
Segment Reporting Information
Net sales	$ 63,411	$ 52,086