Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2012

The following costs related to the Company’s stock compensation plans are included in the unaudited consolidated statements of income:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
Cost of revenues	$	1,036	$	417	$	2,486	$	947
Selling, general and administrative		1,010		368		2,883		1,207

Total	$	2,046	$	785	$	5,369	$	2,154

Stock option activity under the Company’s plans is set forth below:


	Number of Options			Weighted Average		Aggregate Intrinsic Value
Options outstanding at December 31, 2011		6,595,136		$	4.65	$	48,447
Options granted		1,443,810			16.80		3,090
Options exercised		(831,957	)		3.74		(12,646	)
Options forfeited/cancelled		(168,595	)		10.68		(1,393	)

Options outstanding at September 30, 2012		7,038,394		$	7.11	$	83,264

Options vested and exercisable at September 30, 2012		3,794,531		$	3.32	$	59,271
Options expected to vest		3,026,253		$	11.40	$	22,818

Summary of restricted stock activity as of September 30, 2012, and changes during the nine months then ended is presented below:


	Number of Shares			Weighted Average Grant Date Fair Value Per Share
Unvested restricted stock outstanding at January 1, 2012		—		$	—
Restricted stock granted		430,928			14.47
Restricted stock vested		(48,700	)		12.00

Unvested restricted stock outstanding at September 30, 2012		382,228		$	14.78