Stock-based Compensation Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2014

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

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



	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
Cost of goods sold	$	639	$	578	$	1,295	$	1,231
Research and development	1,380		1,206		2,579		2,287
Selling, general and administrative	6,428		5,846		10,734		9,809
Restructuring expenses	—		—		2,595		—
Stock-based compensation expense	$	8,447	$	7,630	$	17,203	$	13,327

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



	June 30,
	2014		2013
Capitalized in inventory	$	694	$	755

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

The weighted average 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,
	2014		2013		2014		2013
Stock Option Awards:
Weighted average grant date fair value per share	$	7.32	$	5.86	$	7.32	$	5.86
Total fair value of awards granted	$	4,446	$	5,817	$	4,446	$	5,817
Total fair value of awards vested	$	4,651	$	5,013	$	4,662	$	5,026
Total intrinsic value of options exercised	$	12,418	$	652	$	21,334	$	1,839
Restricted Stock Unit Awards:
Weighted average grant date fair value per share	$	32.87	$	23.43	$	32.85	$	23.38
Total fair value of awards granted	$	21,660	$	25,188	$	21,830	$	25,330
Total fair value of awards vested	$	24,157	$	13,134	$	27,761	$	13,319
Employee Stock Purchase Plan:
Weighted average grant date fair value per share	$	7.87	$	5.25	$	7.87	$	5.25
Total fair value of shares estimated to be issued	$	591	$	552	$	591	$	552

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, 2013	7,338		$	22.38	4.6
Granted	608		33.86
Exercised	(1,439	)	19.52
Forfeited	(53	)	33.09
Outstanding at June 30, 2014	6,454		$	24.01	5.0	$	69,324
Exercisable at June 30, 2014	5,232		$	23.02	4.0	$	61,455
Vested and expected to vest at June 30, 2014	6,393		$	23.97	5.0	$	68,931

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, 2013	2,788		$	21.16
Granted	665		32.85
Vested and distributed	(807	)	25.00
Forfeited	(85	)	25.99
Outstanding at June 30, 2014	2,561		$	22.82