Numerator:

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

$

80,278

$

90,376

$

269,008

$

293,056

Denominator:

Denominator for basic earnings per share – weighted average shares outstanding

81,229

82,848

81,629

83,401

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

2,758

2,465

2,622

2,644

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

83,987

85,313

84,251

86,045

Basic earnings per common share

$

0.99

$

1.09

$

3.30

$

3.51

Diluted earnings per common share and common share equivalents

$

0.96

$

1.06

$

3.19

$

3.41