Segment Information (Segment Sales By Customer Type) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Segment Reporting Information
Net sales	$ 679,676	$ 627,535
Aircraft Controls
Segment Reporting Information
Net sales	304,045	278,534
Aircraft Controls | Military
Segment Reporting Information
Net sales	146,801	124,200
Aircraft Controls | Commercial
Segment Reporting Information
Net sales	157,244	154,334
Space And Defense Controls
Segment Reporting Information
Net sales	156,068	133,393
Space And Defense Controls | Space
Segment Reporting Information
Net sales	50,176	49,413
Space And Defense Controls | Defense
Segment Reporting Information
Net sales	105,892	83,980
Industrial Systems
Segment Reporting Information
Net sales	219,563	215,608
Industrial Systems | Energy
Segment Reporting Information
Net sales	29,297	38,102
Industrial Systems | Industrial Automation
Segment Reporting Information
Net sales	109,130	96,445
Industrial Systems | Simulation and Test
Segment Reporting Information
Net sales	29,050	30,837
Industrial Systems | Medical
Segment Reporting Information
Net sales	$ 52,086	$ 50,224