Goodwill And Intangible Assets (Intangibles Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Oct. 01, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of acquired intangible assets	$ 17,037	$ 18,518	$ 21,058
Future amortization expenses, 2019	13,400
Future amortization expenses, 2020	11,800
Future amortization expenses, 2021	9,700
Future amortization expenses, 2022	8,200
Future amortization expenses, 2023	$ 7,400