Stockholders' Equity And Stock-Based Compensation (Tables)

12 Months Ended

Sep. 28, 2018

Stockholders' Equity And Stock-Based Compensation [Abstract]

Schedule of Treasury Stock Authorizations [Table Text Block]

The following table summarizes the initial amount of authorized repurchases as well as additional repurchases approved by our Board of Directors as of September 28, 2018 (in thousands):

Authorization Period	Authorization Amount
Fiscal 2010: November 2009	$	250,000
Fiscal 2010: July 2010	300,000
Fiscal 2011: July 2011	250,000
Fiscal 2012: February 2012	100,000
Fiscal 2015: October 2014	200,000
Fiscal 2017: January 2017	200,000
Fiscal 2018: July 2018	350,000
Total	$	1,650,000

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

ime.

The weighted-average assumptions used in the determination of the fair value of our stock options were as follows:

	Fiscal Year Ended
	September 28, 2018		September 29, 2017		September 30, 2016
Expected term (in years)	5.06		5.13		5.24
Risk-free interest rate	2.2	%	2.1	%	1.7	%
Expected stock price volatility	22.6	%	27.4	%	29.8	%
Dividend yield	1.1	%	1.1	%	1.4	%

Summary Of Weighted-Average Fair Value Of Stock Options Granted And Total Intrinsic Value Of Stock Options Exercised

s:

	Fiscal Year Ended
	September 28, 2018		September 29, 2017		September 30, 2016
Expected term (in years)	5.06		5.13		5.24
Risk-free interest rate	2.2	%	2.1	%	1.7	%
Expected stock price volatility	22.6	%	27.4	%	29.8	%
Dividend yield	1.1	%	1.1	%	1.4	%

The following table summarizes the weighted-average fair value (per share) of stock options granted and the total intrinsic value of stock options exercised (in thousands):

	Fiscal Year Ended
	September 28, 2018		September 29, 2017		September 30, 2016
Stock options granted - weighted-average grant date fair value	$	13.19	$	11.39	$	8.49
Stock options exercised - intrinsic value	63,973		28,544		27,485

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

The following table summarizes information about stock options issued under our 2005 Stock Plan:

	Shares		Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Life	Aggregate Intrinsic Value (1)
	(in thousands)				(in years)	(in thousands)
Options outstanding at September 29, 2017	8,741		$	38.65
Grants	1,420		62.34
Exercises	(2,473	)	37.33
Forfeitures and cancellations	(390	)	40.58
Options outstanding at September 28, 2018	7,298		43.61		6.6	$	192,397
Options vested and expected to vest at September 28, 2018	6,911		43.06		6.6	185,978
Options exercisable at September 28, 2018	3,889		$	37.88	5.7	124,812

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

The following table summarizes information about RSUs issued under our 2005 Stock Plan:

	Shares		Weighted-Average Grant Date Fair Value
	(in thousands)
Non-vested at September 29, 2017	2,839		$	44.38
Granted	1,341		62.84
Vested	(1,045	)	40.77
Forfeitures	(329	)	44.62
Non-vested at September 28, 2018	2,806		$	54.52

Schedule of Share-Based Payment Fair Value by Vesting Date

The fair value as of the respective vesting dates of RSUs were as follows (in thousands):

	Fiscal Year Ended
	September 28, 2018		September 29, 2017		September 30, 2016
Restricted stock units - vest date fair value	$	64,755	$	51,985	$	40,283

Schedule Of Stock-Based Compensation Expense By Plan

The following tables separately present stock-based compensation expense both by award type and classification within our consolidated statements of operations (in thousands):

Expense - By Award Type

	Fiscal Year Ended
	September 28, 2018			September 29, 2017			September 30, 2016
Stock options	$	21,083		$	18,630		$	21,311
Restricted stock units	46,162			43,171			42,201
Employee stock purchase plan	4,004			3,542			3,473
Total stock-based compensation	71,249			65,343			66,985
Estimated benefit from income taxes	(12,595		)	(18,959		)	(19,627		)
Total stock-based compensation, net of tax	$	58,654		$	46,384		$	47,358

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

Expense - By Income Statement Classification

	Fiscal Year Ended
Compensation Expense - By Classification	September 28, 2018			September 29, 2017			September 30, 2016
Cost of products	$	1,009		$	946		$	859
Cost of services	565			512			547
Research and development	19,515			18,497			17,771
Sales and marketing	24,997			26,175			27,579
General and administrative	25,163			19,213			20,229
Total stock-based compensation	71,249			65,343			66,985
Estimated benefit from income taxes	(12,595		)	(18,959		)	(19,627		)
Total stock-based compensation, net of tax	$	58,654		$	46,384		$	47,358

Schedule of Stock Repurchase Activity

y $351.5 million.

The following table provides information regarding share repurchase activity under the program in fiscal 2018:

Quarterly Repurchase Activity	Shares Repurchased	Cost (1)		Average Price Paid Per Share (2)
		(in thousands)
Q1 - Quarter ended December 29, 2017	493,884	$	29,999	$	60.73
Q2 - Quarter ended March 30, 2018	77,705	5,001		64.33
Q3 - Quarter ended June 29, 2018	896,689	55,480		61.86
Q4 - Quarter ended September 28, 2018	912,822	59,990		65.71
Total	2,381,100	$	150,470

(1) Cost of share repurchases includes the price paid per share and applicable commissions.

(2) Average price paid per share excludes commission costs.

Schedule of Tax Benefit from Exercise of Options [Table Text Block]

on

	Fiscal Year Ended
Compensation Expense - By Classification	September 28, 2018			September 29, 2017			September 30, 2016
Cost of products	$	1,009		$	946		$	859
Cost of services	565			512			547
Research and development	19,515			18,497			17,771
Sales and marketing	24,997			26,175			27,579
General and administrative	25,163			19,213			20,229
Total stock-based compensation	71,249			65,343			66,985
Estimated benefit from income taxes	(12,595		)	(18,959		)	(19,627		)
Total stock-based compensation, net of tax	$	58,654		$	46,384		$	47,358

The tax benefit that we recognize from shares issued under our ESPP is excluded from the tables above. This benefit was as follows (in thousands):

	Fiscal Year Ended
	September 28, 2018		September 29, 2017		September 30, 2016
Tax benefit - shares issued under ESPP	$	577	$	802	$	550