Stock-based Compensation Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2013

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 March 31,
	2013			2012
Cost of goods sold	$	652		$	704
Research and development	1,081			1,177
Selling, general and administrative	3,963			3,654
Stock-based compensation expense before income taxes	5,696			5,535
Income tax benefit	(1,858		)	(1,674		)
Total stock-based compensation expense after income taxes	$	3,838		$	3,861

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

	March 31,
	2013		2012
Capitalized in inventory	$	452	$	932

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

The fair value of the market-based restricted stock units granted in the three months ended March 31,2013 was estimated with the following weighted-average assumptions:

	Three Months Ended March 31, 2013
	2013
Market-based restricted stock awards:
Risk-free interest rate	0.3	%
Expected dividend yield	—	%
Expected term	3.0 years
Expected volatility	28.8	%
Expected volatility of S&P 500	18.1	%

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 March 31,
	2013		2012
Stock Option Awards:
Total fair value of awards vested	$	13	$	15
Total intrinsic value of options exercised	$	1,187	$	1,420
Restricted Stock Unit Awards:
Weighted average grant date fair value per share	$	17.30	$	24.10
Total fair value of awards granted	$	142	$	51
Total fair value of awards vested	$	184	$	340

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, 2012	6,642		$	21.64	4.7
Granted	—		—
Exercised	(92	)	12.93
Forfeited	(8	)	21.40
Outstanding at March 31, 2013	6,542		$	21.77	4.5	$	38,402
Exercisable at March 31, 2013	5,640		$	20.94	3.9	$	36,535
Vested and expected to vest at March 31, 2013	6,497		$	21.73	4.5	$	38,308

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, 2012	2,372		$	24.59
Granted	8		17.30
Vested and distributed	(7	)	25.90
Forfeited	(87	)	25.24
Outstanding at March 31, 2013	2,286		$	21.54