Stock-Based Compensation (Schedule Of Classification Of Compensation Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2011	Jan. 01, 2011
Total stock-based compensation expense	$ 13,382	$ 11,027
Cost Of License Revenue [Member]
Total stock-based compensation expense	5	3
Cost Of Service Revenue [Member]
Total stock-based compensation expense	2,513	2,137
Sales And Marketing [Member]
Total stock-based compensation expense	3,728	2,429
Research And Development [Member]
Total stock-based compensation expense	2,549	2,393
General And Administrative [Member]
Total stock-based compensation expense	$ 4,587	$ 4,065