Goodwill And Intangible Assets (Intangibles Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of acquired intangible assets	$ 4,600	$ 4,477
Future amortization expenses, 2018	18,400
Future amortization expenses, 2019	17,300
Future amortization expenses, 2020	15,100
Future amortization expenses, 2021	9,400
Future amortization expenses, 2022	$ 7,200