Earnings per Share

3 Months Ended

Mar. 31, 2012

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

Earnings per Share

Net earnings are divided by the weighted average number of shares outstanding during the period to calculate basic earnings per share. Diluted earnings per share are calculated to give effect to stock options and other stock-based awards. The calculation of diluted earnings per share included 136,988 and 132,706 restricted shares for the three months ended March 31, 2012 and 2011, respectively. The calculation of diluted earnings per share also included options to purchase 298,644 and 552,760 shares of common stock for the three months ended March 31, 2012 and 2011, respectively.