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Earnings Per Share
 3 Months Ended
Mar. 31, 2014
Earnings Per Share [Abstract]  
Earnings Per Share
Earnings Per Share

The following table sets forth the computation of basic and diluted income per common share for the periods presented (dollars and shares in thousands, except per share data).
 
Three Months Ended
March 31
 
2014
 
2013
Numerator:
 
 
 
Net income
$
90,086

 
$
62,294

Less: distributed and undistributed earnings allocated to participating securities
(1,402
)
 
—

Net income attributable to common shareholders
$
88,684

 
$
62,294

Denominator:
 
 
 
Weighted average basic common shares outstanding
96,787

 
96,415

Effect of dilutive securities
36

 
1,001

Diluted common shares outstanding
96,823

 
97,416

Basic income per common share
$
0.92

 
$
0.65

Diluted income per common share
$
0.92

 
$
0.64


All outstanding options to purchase shares at March 31, 2014 and 2013, were included in the computation of diluted common shares outstanding.