Stockholders Equity

6 Months Ended

Jun. 30, 2011

Stockholders' Equity [Abstract]

Stockholders' Equity

10. Stockholders’ Equity

On April 27, 2011, we announced that our board of directors authorized a 3-for-2 stock split of our common stock to be effected in the form of a stock dividend of one share of our stock for every two shares outstanding. The dividend was distributed on May 20, 2011.

In connection with the plans described in Note 4, “Share-Based Compensation,” we issued approximately 599,000 shares of common stock, net of shares retired to settle employees’ income tax obligations, for the six months ended June 30, 2011. For the six months ended June 30, 2011, the $11.4 million increase in additional paid-in capital was primarily generated by employee stock plan transactions.