Numerator-

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

$

347,055

$

391,382

$

241,415

Denominator-

Denominator for basic earnings per share – weighted average shares outstanding

81,089

83,100

83,838

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

2,631

2,627

2,979

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

83,720

85,727

86,817

Basic earnings per common share

$

4.28

$

4.71

$

2.88

Diluted earnings per common share and common share equivalents

$

4.15

$

4.57

$

2.78