Goodwill And Intangible Assets (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Apr. 02, 2011	Mar. 31, 2012	Apr. 02, 2011
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of acquired intangible assets	$ 7,622	$ 7,012	$ 15,293	$ 13,956
Future amortization expenses, 2012			31,175
Future amortization expenses, 2013			27,556
Future amortization expenses, 2014			24,967
Future amortization expenses, 2015			21,924
Future amortization expenses, 2016			$ 19,994