Exhibit 11



STATEMENT OF COMPUTATION OF PER SHARE EARNINGS



The following computations set forth the calculation of basic and diluted net income per common share and common share equivalents for the nine-month and three-month
periods ended September 30, 2005 and 2004:



|                                                                                    |  |                                 |            |                                  |   |            |  |      |            |  |   |           
|----------------------------------------------------------------------------------- |  | ------------------------------- | ---------- | -------------------------------- | - | ---------- |  | ---- | ---------- |  | - | ----------
|                                                                                    |  | Nine Months Ended September 30, |            | Three Months Ended September 30,
|                                                                                    |  | 2005                            |            | 2004                             |   | 2005       |  | 2004
|Net income                                                                          |  | $                               | 75,228,407 |                                  | $ | 66,763,266 |  | $    | 25,102,904 |  | $ | 20,720,248
|                                                                                    |  |                                 |            |                                  |   |            |  |      |            |  |   |           
|Weighted average number of common shares outstanding                                |  |                                 | 80,115,937 |                                  |   | 80,024,581 |  |      | 80,099,751 |  |   | 79,938,616
|                                                                                    |  |                                 |            |                                  |   |            |  |      |            |  |   |           
|Net income per common share - Basic                                                 |  | $                               | 0.94       |                                  | $ | 0.83       |  | $    | 0.31       |  | $ | 0.26      
|                                                                                    |  |                                 |            |                                  |   |            |  |      |            |  |   |           
|                                                                                    |  |                                
|                                                                                    |  | Nine Months Ended September 30, |            | Three Months Ended September 30,
|                                                                                    |  | 2005                            |            | 2004                             |   | 2005       |  | 2004
|Net income                                                                          |  | $                               | 75,228,407 |                                  | $ | 66,763,266 |  | $    | 25,102,904 |  | $ | 20,720,248
|                                                                                    |  |                                 |            |                                  |   |            |  |      |            |  |   |           
|Weighted average number of common shares outstanding                                |  |                                 | 80,115,937 |                                  |   | 80,024,581 |  |      | 80,099,751 |  |   | 79,938,616
|                                                                                    |  |                                 |            |                                 
|Common share equivalents resulting from:                                            |  |                                 |            |                                  |   |            |  |      |            |  |   |           
|Dilutive stock options and restrictive stock awards                                 |  |                                 | 526,237    |                                  |   | 501,422    |  |      | 602,403    |  |   | 458,736   
|                                                                                    |  |                                 |            |                                  |   |            |  |      |            |  |   |           
|Adjusted weighted average number of common and common equivalent shares outstanding |  |                                 | 80,642,174 |                                  |   | 80,526,003 |  |      | 80,702,154 |  |   | 80,397,352
|                                                                                    |  |                                 |            |                                  |   |            |  |      |            |  |   |           
|Net income per common share - Diluted                                               |  | $                               | 0.93       |                                  | $ | 0.83       |  | $    | 0.31       |  | $ | 0.26      
|                                                                                    |  |                                 |            |                                  |   |            |  |      |            |  |   |