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 six-month and three-month
periods ended June 30, 2005 and 2004:



|                                                     |  |                           |            |                             |   |            |  |      |            |  |   |           
|---------------------------------------------------- |  | ------------------------- | ---------- | --------------------------- | - | ---------- |  | ---- | ---------- |  | - | ----------
|                                                     |  | Six Months Ended June 30, |            | Three Months Ended June 30,
|                                                     |  | 2005                      |            | 2004                        |   | 2005       |  | 2004
|Net income                                           |  | $                         | 50,125,505 |                             | $ | 46,043,017 |  | $    | 28,555,161 |  | $ | 20,566,130
|                                                     |  |                           |            |                             |   |            |  |      |            |  |   |           
|Weighted average number of common shares outstanding |  |                           | 80,124,054 |                             |   | 80,068,036 |  |      | 80,082,617 |  |   | 80,039,000
|                                                     |  |                           |            |                             |   |            |  |      |            |  |   |           
|Net income per common share - Basic                  |  | $                         | 0.63       |                             | $ | 0.58       |  | $    | 0.36       |  | $ | 0.26      
|                                                     |  |                           |            |                             |   |            |  |      |            |  |   |           



|                                                                                   |  |                           |            |                             |   |            |  |      |            |  |   |           
|---------------------------------------------------------------------------------- |  | ------------------------- | ---------- | --------------------------- | - | ---------- |  | ---- | ---------- |  | - | ----------
|                                                                                   |  | Six Months Ended June 30, |            | Three Months Ended June 30,
|                                                                                   |  | 2005                      |            | 2004                        |   | 2005       |  | 2004
|Net income                                                                         |  | $                         | 50,125,505 |                             | $ | 46,043,017 |  | $    | 28,555,161 |  | $ | 20,566,130
|                                                                                   |  |                           |            |                             |   |            |  |      |            |  |   |           
|Weighted average number of common shares outstanding                               |  |                           | 80,124,054 |                             |   | 80,068,036 |  |      | 80,082,617 |  |   | 80,039,000
|                                                                                   |  |                           |            |                            
|Common share equivalents resulting from:                                           |  |                           |            |                             |   |            |  |      |            |  |   |           
|Dilutive stock options and restrictive stock awards                                |  |                           | 485,297    |                             |   | 522,763    |  |      | 455,995    |  |   | 492,351   
|                                                                                   |  |                           |            |                             |   |            |  |      |            |  |   |           
|Adjusted weighted average number of common and common equilvant shares outstanding |  |                           | 80,609,351 |                             |   | 80,590,799 |  |      | 80,538,612 |  |   | 80,531,351
|                                                                                   |  |                           |            |                             |   |            |  |      |            |  |   |           
|Net income per common share - Diluted                                              |  | $                         | 0.62       |                             | $ | 0.57       |  | $    | 0.35       |  | $ | 0.26      
|                                                                                   |  |                           |            |                             |   |            |  |      |            |  |   |