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Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2018
Earnings Per Share [Abstract]  
Computation Of Basic And Diluted Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share for the three months ended March 31, 2018 and 2017 (in thousands, except per share data):

 

 

 

Three Months Ended March 31,

 

 

 

2018

 

 

2017

 

Net income

 

$

88,761

 

 

$

65,512

 

Preferred dividends

 

 

2,344

 

 

 

2,344

 

Net income available to common shareholders

 

$

86,417

 

 

$

63,168

 

Shares for basic and diluted calculation:

 

 

 

 

 

 

 

 

Average shares used in basic computation

 

 

71,999

 

 

 

68,386

 

Dilutive effect of stock options and units (1)

 

 

9,790

 

 

 

12,309

 

Average shares used in diluted computation

 

 

81,789

 

 

 

80,695

 

Earnings per common share:

 

 

 

 

 

 

 

 

Basic

 

$

1.20

 

 

$

0.92

 

Diluted

 

$

1.06

 

 

$

0.78

 

 

(1)

Diluted earnings per share is computed on the basis of the weighted-average number of shares of common stock plus the effect of dilutive potential common shares outstanding during the period using the treasury stock method.