Three Months Ended September 30,

Nine Months Ended September 30,

2012

2011

2012

2011

Numerator:

Numerator for basic and diluted earnings per share – Net income available to common shareholders

$

14,909,000

$

16,045,000

$

48,237,000

$

35,830,000

Denominator–

Denominator for basic earnings per share – weighted average shares outstanding

38,740,275

37,932,300

38,602,099

37,796,072

Effect of dilutive securities– Employee and director stock options and restricted share awards

861,913

1,026,598

1,030,779

1,159,396

Denominator for diluted earnings per share – adjusted weighted average shares outstanding and assumed conversions

39,602,188

38,958,898

39,632,878

38,955,468

Basic earnings per common share

$

.38

$

.42

$

1.25

$

.95

Diluted earnings per common share and common share equivalents

$

.38

$

.41

$

1.22

$

.92