Stock-Based Compensation Plans

3 Months Ended

Mar. 31, 2013

Stock-Based Compensation Plans

Stock-Based Compensation Plans

7.  Stock-Based Compensation Plans

Our 2007 Stock Incentive Plan (the 2007 Plan) was adopted on May 24, 2007. Under this 2007 Plan, a total of 2,000,000 shares are authorized for stock based compensation in the form of either restricted stock or stock options. There have been 1,728,156 shares of restricted stock awarded to date. The fair value of the restricted stock awards equaled the stock price at the date of grants. The following table summarizes restricted stock activity during the years ended December 31, 2011, December 31, 2012 and the three months ended March 31, 2013:

	Shares
Restricted stock at December 31, 2010	575,791
Granted in 2011 (vesting over 4 years)	324,924
Granted in 2011 (vesting on first anniversary from date of issuance)	22,100
Cancelled in 2011	(27,477	)
Vested in 2011	(244,044	)
Restricted stock at December 31, 2011	651,294
Granted in 2012 (vesting over 4 years)	283,000
Granted in 2012 (vesting on first anniversary from date of issuance)	28,040
Cancelled in 2012	(8,988	)
Vested in 2012	(270,692	)
Restricted stock at December 31, 2012	682,654
Granted in 2013	—
Cancelled in 2013	—
Vested in 2013	(43,750	)
Restricted Stock at March 31, 2013	638,904

All cancelled shares have reverted to the share reserve and are available for issuance at a later date, in accordance with the 2007 Plan.

Our accounting policy is to recognize the associated expense of such awards on a straight-line basis over the vesting period. Approximately $0.8 million and $0.7 million in stock compensation expense were recorded in the three months ended March 31, 2013 and March 31, 2012, respectively. The stock compensation expense related to the restricted stock awards will be recognized over the average remaining vesting period of 2.3 years and totals $5.8 million at March 31, 2013 compared to 2.8 years and totaling $7.8 million at March 31, 2012. At March 31, 2013, the intrinsic value of unvested restricted stock awards issued through March 31, 2013 is $9.7 million. At March 31, 2012, the intrinsic value of unvested restricted stock awards issued through March 31, 2012 was $10.0 million. The 2007 Plan terminates on May 24, 2017.

In the three months ended March 31, 2013, 12,375 options under the 1996 Plan were exercised and 6,500 options were canceled. As of March 31, 2013, there are 118,053 stock options remaining under the 1996 Plan which have an intrinsic value of $0.7 million. In the three months ended March 31, 2012, 83,069 options under the 1996 Plan were exercised. As of March 31, 2012, there were 360,512 stock options remaining under the 1996 Plan having an intrinsic value of $2.3 million.