Stock-based Compensation Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2012

Share-based Compensation [Abstract]

Stock-based compensation expense and related tax benefit recognized in the Consolidated Statements of Income and capitalized in the Consolidated Balance Sheets

Stock-based compensation expense and related tax benefit recognized in the Consolidated Statements of Income are as follows (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
Cost of goods sold	$	917		$	881		$	1,621		$	1,522
Research and development	1,298			1,358			2,474			2,844
Selling, general and administrative	5,650			5,349			9,305			9,510
Stock-based compensation expense before income taxes	7,865			7,588			13,400			13,876
Income tax benefit	(2,389		)	(2,201		)	(4,063		)	(3,991		)
Total stock-based compensation expense after income taxes	$	5,476		$	5,387		$	9,337		$	9,885

Stock-based compensation costs capitalized in inventory are as follows (in thousands):

	June 30,
	2012		2011
Capitalized in inventory	$	697	$	943

Fair value of the stock-based awards, as determined under the Black-Scholes model, granted weighted-average assumptions

The fair value of the stock-based awards, as determined under the Black-Scholes model, granted in the three and six months ended June 30,2012 and 2011 was estimated with the following weighted-average assumptions:

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
Stock option awards:
Risk-free interest rate	0.4	%	1.0	%	0.4	%	1.0	%
Expected dividend yield	1.3	%	0.7	%	1.3	%	0.7	%
Expected term	4.2 years		4.3 years		4.2 years		4.3 years
Expected volatility	39.7	%	42.3	%	39.7	%	42.3	%
Employee stock purchase plan:
Risk-free interest rate	0.2	%	0.1	%	0.2	%	0.1	%
Expected dividend yield	1.3	%	0.7	%	1.3	%	0.7	%
Expected term	6 months		6 months		6 months		6 months
Expected volatility	27.4	%	21.3	%	27.4	%	21.3	%

Weighted-average fair value of stock-based compensation awards granted and vested, and the intrinsic value of options exercised

The fair value of stock-based compensation awards granted and vested, and the intrinsic value of options exercised during the period were (in thousands, except per share amounts):

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
Stock Option Awards:
Weighted average grant date fair value per share	$	6.43	$	11.68	$	6.43	$	11.68
Total fair value of awards granted	$	4,104	$	4,513	$	4,104	$	4,513
Total fair value of awards vested	$	5,970	$	5,030	$	5,985	$	7,962
Total intrinsic value of options exercised	$	939	$	5,798	$	2,358	$	13,153
Restricted Stock Unit Awards:
Weighted average grant date fair value per share	$	17.21	$	34.50	$	17.22	$	34.48
Total fair value of awards granted	$	30,471	$	21,337	$	30,522	$	21,524
Total fair value of awards vested	$	11,763	$	18,083	$	12,103	$	18,933
Employee Stock Purchase Plan:
Weighted average grant date fair value per share	$	5.02	$	7.36	$	5.02	$	7.36
Total fair value of shares estimated to be issued	$	1,106	$	1,051	$	1,106	$	1,051

Information with respect to stock option activity

 Information with respect to stock option activity is as follows:

	Shares (in  thousands)		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value (in thousands)
Outstanding at December 31, 2011	6,570		$	20.73	5.0
Granted	638		22.30
Exercised	(169	)	9.90
Forfeited	(97	)	26.10
Outstanding at June 30, 2012	6,942		$	21.06	5.1	$	17,527
Exercisable at June 30, 2012	6,027		$	20.17	4.4	$	17,526
Vested and expected to vest at June 30, 2012	6,896		$	21.02	5.1	$	17,527

Information with respect to restricted stock unit activity

Information with respect to restricted stock unit activity is as follows:

	Shares (in  thousands)		Weighted Average Grant Date Fair Value
Outstanding at December 31, 2011	1,305		$	30.89
Granted	1,775		17.22
Vested and distributed	(548	)	29.27
Forfeited	(70	)	32.58
Outstanding at June 30, 2012	2,462		$	21.44