Goodwill and Intangible Assets (Amortization of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Mar. 29, 2014	Mar. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of acquired intangible assets	$ 7,985	$ 6,640	$ 15,774	$ 13,263
Cost of license revenue	4,316	4,628	8,721	9,267
Cost of service revenue	91	0	183	0
Total amortization expense	$ 12,392	$ 11,268	$ 24,678	$ 22,530