Stockholders' Equity and Equity Compensation Plans (Tables)

9 Months Ended

Sep. 30, 2014

Summary of Unvested Restricted Common Stock Activity

Stock Incentive Plan. In May 2014, our stockholders approved an increase of 2.9 million shares authorized for issuance under the 2005 Stock Incentive Plan, from 15.8 million shares to 18.7 million shares.

Stock-Based Awards. A summary of our unvested restricted common stock activity during the third quarter and nine months ended September 30, 2014 is as follows (shares in thousands):

	Quarter Ended September 30, 2014					Nine Months Ended September 30, 2014
	Shares			Weighted- Average Grant Date Fair Value		Shares			Weighted- Average Grant Date Fair Value
Unvested awards, beginning		1,832		$	21.27		1,922			$	18.57
Awards granted		629			26.64		1,279				26.46
Awards forfeited/cancelled		(16	)		20.72		(67	)			20.43
Awards vested		(38	)		23.36		(727	)			18.78
Unvested awards, ending		2,407		$	22.64		2,407			$	22.64