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Employee Benefit Plans (Tables)

9 Months Ended

Oct. 01, 2017

Employee Benefits and Share-based Compensation [Abstract]

Schedule Of Stock Option Activity

Option Activity

Stock option activity during the nine months ended October 1, 2017 was as follows:

	Number of shares			Weighted Average Exercise Price Per Share
	(In thousands)			(In dollars)
Outstanding as of December 31, 2016	1,884			$	31.14
Granted	328			42.70
Exercised	(230	)		27.83
Cancelled	—			—
Expired	(1	)		31.70
Outstanding as of October 1, 2017	1,981			$	33.44

Schedule Of RSU Activity

RSU Activity

RSU activity during the nine months ended October 1, 2017 was as follows:

	Number of shares			Weighted Average Grant Date Fair Value Per Share
	(In thousands)			(In dollars)
Outstanding as of December 31, 2016	996			$	36.22
Granted	553			49.50
Vested	(382	)		35.13
Cancelled	(54	)		43.87
Outstanding as of October 1, 2017	1,113			$	42.83

Schedule Of Valuation And Expense Information

The table below sets forth the weighted average assumptions used to estimate the fair value of option grants and purchase rights granted under the ESPP during the three and nine months ended October 1, 2017 and October 2, 2016.

	Three Months Ended										Nine Months Ended
	Stock Options				ESPP						Stock Options						ESPP
	October 1, 2017		October 2, 2016		October 1, 2017			October 2, 2016			October 1, 2017			October 2, 2016			October 1, 2017			October 2, 2016
Expected life (in years)	NA		NA		0.5			0.5			4.4			4.4			0.5			0.5
Risk-free interest rate	NA		NA		1.12	%		0.45	%		1.65	%		1.28	%		0.93	%		0.43	%
Expected volatility	NA		NA		31.3	%		28.6	%		31.6	%		35.4	%		29.7	%		38.3	%
Dividend yield	NA		NA		—			—			—			—			—			—

Schedule Of Total Stock-Based Compensation Expense Resulting From Stock Options, Restricted Stock Awards, And The Employee Stock Purchase Plan

The following table sets forth the stock-based compensation expense resulting from stock options, RSUs and the ESPP included in the Company’s unaudited condensed consolidated statements of operations:

	Three Months Ended								Nine Months Ended
	October 1, 2017				October 2, 2016				October 1, 2017				October 2, 2016
	(In thousands)
Cost of revenue	$	499			$	426			$	1,477			$	1,316
Research and development	1,056				1,087				3,748				3,071
Sales and marketing	1,654				1,300				4,339				3,835
General and administrative	2,374				2,057				6,848				6,078
Total stock-based compensation	$	5,583			$	4,870			$	16,412			$	14,300

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Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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