Stockholders' Equity and Stock-Based Compensation (Schedule Of Stock-Based Compensation Expense Included In Our Condensed Consolidated Statements Of Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 28, 2012		Dec. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 17,704	[1]	$ 11,439	[1]
Benefit from income taxes	(5,413)	[1]	(3,669)	[1]
Total stock-based compensation, net of tax	12,291	[1]	7,770	[1]
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	8,309	[1],[2]	6,058	[1],[2]
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	8,340	[1]	5,264	[1]
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	1,055	[1]	82	[1]
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	0	[1]	35	[1]
Cost Of Products [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	248		166
Cost Of Services [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	151		56
Research And Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	4,887		2,664
Sales And Marketing [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	5,991		3,715
General And Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 6,427		$ 4,838

[1] We also recognized $0.1 million and $0.1 million in the first quarter of fiscal 2013 and 2012, respectively, of tax benefit from certain exercises of incentive stock options and shares issued under our ESPP, which is not included in the table above.

[2] Expense excludes $0.2 million in the first quarter of fiscal 2012 related to stock-based compensation which was capitalized to property, plant and equipment.