Numerator:

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

$

79,132

$

80,278

$

229,401

$

269,008

Denominator:

Denominator for basic earnings per share – weighted average shares outstanding

79,216

81,229

78,878

81,629

Effect of dilutive securities–

Employee and director stock options and restricted share awards

2,668

2,758

2,729

2,622

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

81,884

83,987

81,607

84,251

Basic earnings per common share

$

1.00

$

0.99

$

2.91

$

3.30

Diluted earnings per common share and common share equivalents

$

0.97

$

0.96

$

2.81

$

3.19