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As of December 31, 2010, the total amount of unrecognized stock- based compensation expense related to restricted stock units was approximately $27,425,000. We expect to recognize this expense over an average period of approximately 33 months. 

## Restricted Stock 

In conjunction with the Realpoint acquisition in May 2010, we issued 199,174 shares of restricted stock to the selling employee sharehold- ers. The restricted stock vests ratably over a five-year period from the acquisition date and may be subject to forfeiture if the holder terminates his or her employment during the vesting period. Because of the terms of the restricted share agreements, in accordance with ASC 805, Business Combinations , we account for these grants as stock-based compensation expense, and not as part of the acquisi- tion consideration. See Note 7 for additional information concern- ing the Realpoint acquisition. 

We measured the fair value of the restricted stock on the date of grant based on the closing market price of our common stock on the day prior to the grant. We amortize this value to stock-based compensation expense ratably over the vesting period. We have assumed that all of the restricted stock will ultimately vest, and therefore we have not incorporated a forfeiture rate for purposes of determining the stock-based compensation expense. 

## Stock Option Activity 

As of December 31, 2010, the total amount of unrecognized stock- based compensation expense related to restricted stock was approximately $8,115,000. We expect to recognize this expense over 52 months, from January 2011 through April 2015. 

## Stock Option Activity 

We have not made any stock option grants since January 2006. All options granted under the 2004 Stock Incentive Plan and the Prior Plans were vested as of January 1, 2010 and there was no unrec- ognized stock-based compensation expense related to stock options. Because the options expire 10 years after the date of grant, some options granted under these plans remain outstanding as of December 31, 2010. Almost all of the options granted under the 2004 Stock Incentive Plan have a premium feature in which the exercise price increases over the term of the option at a rate equal to the 10-year Treasury bond yield as of the date of grant. 

The following tables summarize stock option activity for our various stock option grants. The first table includes activity for options granted at an exercise price below the fair value per share of our common stock on the grant date; the second table includes activity for all other option grants. 

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