Earnings per Share

9 Months Ended

Sep. 30, 2011

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 156,213 and 132,461 restricted shares for the three months ended September 30, 2011 and 2010, respectively, and 114,911 and 111,187 restricted shares for the nine months ended September 30, 2011 and 2010, respectively. The calculation of diluted earnings per share also included 327,185 and 552,420 options to purchase shares of common stock for the three months ended September 30, 2011 and 2010, respectively, and 438,803 and 538,149 for the nine months ended September 30, 2011 and 2010, respectively.