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 shares equivalents for the six-month and three-month periods ended June 30, 2006 and 2005:

		Six Months Ended June 30,						Three Months Ended June 30,
		2006			2005			2006			2005
Net income		$	45,645,890		$	50,125,505		$	25,508,448		$	28,555,161
Weighted average number of common shares outstanding			80,315,256			80,124,054			80,325,375			80,082,617
Net income per common share - Basic		$	0.57		$	0.63		$	0.32		$	0.36
		Six Months Ended June 30,						Three Months Ended June 30,
		2006			2005			2006			2005
Net income		$	45,645,890		$	50,125,505		$	25,508,448		$	28,555,161
Weighted average number of common shares outstanding			80,315,256			80,124,054			80,325,375			80,082,617
Common share equivalents resulting from:
Dilutive stock options and restricted stock awards			816,727			485,297			853,835			455,995
Adjusted weighted average number of common and common equivalent shares outstanding			81,131,983			80,609,351			81,179,210			80,538,612
Net income per common share - Diluted		$	0.56		$	0.62		$	0.31		$	0.35