Goodwill and Intangible Assets (Amortization Of Intangible Assets) (Details) (USD $)	3 Months Ended
	Dec. 29, 2012	Dec. 31, 2011
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of acquired intangible assets	$ 6,623,000	$ 5,209,000
Cost of license revenue	4,639,000	4,103,000
Total amortization expense	11,262,000	9,312,000
Estimated aggregate future amortization expense for intangible assets, remainder of 2013	33,700,000
Estimated aggregate future amortization expense for intangible assets, 2014	46,300,000
Estimated aggregate future amortization expense for intangible assets, 2015	44,600,000
Estimated aggregate future amortization expense for intangible assets, 2016	37,900,000
Estimated aggregate future amortization expense for intangible assets, 2017	34,300,000
Estimated aggregate future amortization expense for intangible assets, 2018	30,500,000
Estimated aggregate future amortization expense for intangible assets, thereafter	$ 65,500,000