Stock-Based Compensation (Tables)

6 Months Ended

Mar. 30, 2012

Share-based Compensation [Abstract]

Schedule of Stock-Based Compensation Expense Included in Condensed Consolidated Statement of Operations

	Fiscal Quarter Ended					Fiscal Year-to-Date Ended
	April 1, 2011			March 30, 2012		April 1, 2011			March 30, 2012
	(in thousands)
Stock-based compensation expense:
Stock options	$	6,130		$	5,995	$	13,027		$	12,054
Restricted stock units	4,595			5,880		8,721			11,144
Employee stock purchase plan	184			144		366			225
Stock appreciation rights	(169		)	44		(114		)	79
Total stock-based compensation expense	$	10,740		$	12,063	$	22,000		$	23,502

Schedule Of Stock-Based Compensation Expense

	Fiscal Quarter Ended				Fiscal Year-to-Date Ended
	April 1, 2011		March 30, 2012		April 1, 2011		March 30, 2012
	(in thousands)
Stock-based compensation expense was classified as follows:
Cost of products	$	168	$	179	$	314	$	345
Cost of services	44		61		82		117
Research and development	2,611		2,968		4,934		5,632
Sales and marketing	3,367		4,004		6,363		7,719
General and administrative	4,550		4,851		10,307		9,689
Total stock-based compensation expense	$	10,740	$	12,063	$	22,000	$	23,502

Summary Of Stock Options Issued To Officers, Directors, And Employees Under 2000 Stock Incentive Plan And 2005 Stock Plan

	Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life	Aggregate Intrinsic Value
	(in thousands)				(in years)	(in thousands)
Stock options outstanding at September 30, 2011	5,801		$	45.19
Grants	2,086		31.55
Exercises	(181	)	24.34
Forfeitures and cancellations	(269	)	51.49
Stock options outstanding at March 30, 2012	7,437		$	41.64	7.8	$	34,766
Stock options vested at March 30, 2012 and expected to vest	7,143		$	41.61	7.7	$	33,732
Stock options exercisable at March 30, 2012	3,355		$	40.27	6.3	$	19,438

Schedule Of Fair Value Of Stock-Based Awards Estimated Using Weighted-Average Assumptions

	Fiscal Quarter Ended				Fiscal Year-to-Date Ended
	April 1, 2011		March 30, 2012		April 1, 2011		March 30, 2012
Expected life (in years)	4.40		4.53		4.40		4.53
Risk-free interest rate	1.6	%	0.7	%	1.5	%	0.7	%
Expected stock price volatility	41.2	%	43.5	%	41.5	%	44.4	%
Dividend yield	—		—		—		—

Summary Of Restricted Stock Units Issued To Officers, Directors, And Employees Under 2005 Stock Incentive Plan

	Shares		Weighted Average Fair Value
	(in thousands)
Non-vested at September 30, 2011	946		$	53.71
Granted	1,082		32.08
Vested	(336	)	51.44
Forfeitures and cancellations	(47	)	48.00
Non-vested at March 30, 2012	1,645		$	40.11