Numerator:

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

$

78,661

$

98,275

$

150,269

$

188,730

Denominator:

Denominator for basic earnings per share – weighted average shares outstanding

78,270

81,690

78,706

81,926

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

2,508

2,466

2,761

2,575

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

80,778

84,156

81,467

84,501

Basic earnings per common share

$

1.01

$

1.20

$

1.91

$

2.31

Diluted earnings per common share and common share equivalents

$

0.97

$

1.17

$

1.84

$

2.23