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|   
|   |   | Three months ended |   | Nine months ended |   |  
|   |   | September 30,2012
 |   | September 30,2011
 |   | September 30,2012
 |   | September 30,2011
 |   |  
| Basic earnings per common share |   |   |   |   |   |   |   |   |   |  
| Net income |   | $ | 2,346 |   | $ | 3,967 |   | $ | 7,051 |   | $ | 12,890 |   |  
| Less income allocated to participating securities |   | 19 |   | 51 |   | 51 |   | 271 |   |  
| Net income allocated to common shareholders |   | $ | 2,327 |   | $ | 3,916 |   | $ | 7,000 |   | $ | 12,619 |   |  
| Weighted average common shares outstanding |   | 21,922,173 |   | 21,760,753 |   | 21,885,301 |   | 21,609,810 |   |  
|   |   | $ | 0.11 |   | $ | 0.18 |   | $ | 0.32 |   | $ | 0.59 |   |  
|   |   |   |   |   |   |   |   |   |   |  
| Earnings per common share assuming dilution |   |   |   |   |   |   |   |   |   |  
| Net income |   | $ | 2,346 |   | $ | 3,967 |   | $ | 7,051 |   | $ | 12,890 |   |  
| Less income allocated to participating securities |   | 19 |   | 51 |   | 51 |   | 271 |   |  
| Net income allocated to common shareholders |   | $ | 2,327 |   | $ | 3,916 |   | $ | 7,000 |   | $ | 12,619 |   |  
| Weighted average common shares outstanding |   | 21,922,173 |   | 21,760,753 |   | 21,885,301 |   | 21,609,810 |   |  
| Incremental shares applicable to stock based compensation |   | 56,842 |   | 77,309 |   | 73,172 |   | 145,742 |   |  
| Weighted average common shares assuming dilution |   | 21,979,015 |   | 21,838,062 |   | 21,958,473 |   | 21,755,552 |   |  
|   |   | $ | 0.10 |   | $ | 0.18 |   | $ | 0.31 |   | $ | 0.57 |   |    |  |