Segments (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Revenue, Major Customer and Product Lines
Sales	$ 765,207	$ 740,969	$ 718,811	$ 679,676	$ 700,866	$ 692,018	$ 689,049	$ 627,535	$ 2,904,663	$ 2,709,468	$ 2,497,524
Aircraft Controls
Revenue, Major Customer and Product Lines
Sales									$ 1,302,972	$ 1,193,505	$ 1,124,885
Aircraft Controls | Aftermarket Sales | Net Sales, Segment
Revenue, Major Customer and Product Lines
Percentage of sales									27.00%	29.00%	27.00%
Boeing
Revenue, Major Customer and Product Lines
Sales									$ 370,306	$ 382,184	$ 321,110
Boeing | Customer Concentration Risk | Net Sales
Revenue, Major Customer and Product Lines
Percentage of sales									13.00%	14.00%	13.00%
Boeing Commercial Airplanes
Revenue, Major Customer and Product Lines
Sales									$ 264,805	$ 238,118	$ 252,977
Government Prime and Sub-Contract
Revenue, Major Customer and Product Lines
Sales									$ 1,017,905	$ 897,882	$ 775,271