Stockholders' Equity and Equity Compensation Plans (Tables)

6 Months Ended

Jun. 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 second quarter and six months ended June 30, 2014 is as follows (shares in thousands):

	Quarter Ended June 30, 2014					Six Months Ended June 30, 2014
	Shares			Weighted- Average  Grant Date Fair Value		Shares			Weighted- Average  Grant Date Fair Value
Unvested awards, beginning		1,848		$	21.21		1,922			$	18.57
Awards granted		18			25.09		650				26.28
Awards forfeited/cancelled		(21	)		20.12		(51	)			20.32
Awards vested		(13	)		21.03		(689	)			18.52
Unvested awards, ending		1,832		$	21.27		1,832			$	21.27