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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2011

Stock-Based Compensation [Abstract]

Stock option activity

		Shares (in thousands)				Weighted- Average Exercise Price				Weighted- Average Remaining Contractual Term (in years)				Aggregate Intrinsic Value (in thousands)
	Outstanding as of December 31, 2010												4,318						$	20.05
Granted			1,769				31.83
Exercised			(1,501	)			20.67
Forfeited or expired			(113	)			22.26
Outstanding as of December 31, 2011			4,473			$	24.48				7.5			$	50,680
Exercisable as of December 31, 2011			1,187			$	20.51				4.8			$	18,211

Weighted-average assumptions used in estimating the fair values of stock options granted

		Year Ended December 31,
		2011				2010				2009
Risk-free rate			2.9	%			3.3	%			3.3	%
Expected dividend yield			1.1	%			1.3	%			1.4	%
Expected volatility			43	%			44	%			43	%
Expected term (in years)			5.5				5.3				4.8

Stock-based compensation expense

		Year Ended December 31,
		2011				2010				2009
Product cost of revenue		$	456			$	206			$	532
Service cost of revenue			172				72				242
Research, development, and engineering			2,268				1,020				2,163
Selling, general, and administrative			5,172				1,729				6,286
		$	8,068			$	3,027			$	9,223

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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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph g(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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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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