Stock Options. Prior to 2006, the Company issued stock options that become exercisable ratably over a three year period and expire ten years from the date of the grant. The table below summarizes stock option activity for the three years ended December31, 2007:

At December 31, 2007, the Company had $0.1 million associated with nonvested awards that will be expensed in 2008. The total intrinsic value (current market price less the option strike price) of options exercised during the years ended December 31, 2007 and 2006 was $4.5 million and $2.5 million, respectively, and the Company received $1.0 million and $0.6 million in cash inconnection with these exercises for the years ended December 31, 2007 and 2006, respectively.

Restricted Stock. The Company began issuing shares of restricted common stock in 2005. Restricted stock is recorded as deferred compensation based on the closing price of the Company’s common stock on the grant date and is amortized to stock-based compensation expense over the vesting period (generally one to three years). The unamortized deferred compensation obligation amounted to $6.4 million as of December 31, 2007. The table below summarizes restricted stock activity for the threeyears ended December 31, 2007: