Stock-Based Compensation (Schedule Of Classification Of Compensation Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 29, 2012	Dec. 31, 2011
Total stock-based compensation expense	$ 11,893	$ 13,382
Cost Of License Revenue [Member]
Total stock-based compensation expense	5	5
Cost Of Service Revenue [Member]
Total stock-based compensation expense	1,612	1,563
Cost of Maintenance Revenue [Member]
Total stock-based compensation expense	826	950
Sales And Marketing [Member]
Total stock-based compensation expense	2,458	3,728
Research And Development [Member]
Total stock-based compensation expense	2,512	2,549
General And Administrative [Member]
Total stock-based compensation expense	$ 4,480	$ 4,587