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Earnings Per Share
 6 Months Ended
Jun. 30, 2014
Earnings Per Share [Abstract]  
Earnings Per Share
Earnings Per Share
 
A reconciliation between basic and diluted earnings per share is as follows (in thousands, except per share data):
 
 
Quarter Ended June 30,
 
Six Months Ended June 30,
 
2014
 
2013
 
2014
 
2013
Net income for basic and diluted earnings per share
$
137,673

 
$
24,747

 
$
164,130

 
$
100,973

Weighted-average common shares outstanding
222,189

 
219,502

 
221,745

 
219,301

Dilutive effect of stock options, performance share awards and restricted stock awards
1,192

 
1,146

 
1,310

 
1,295

Diluted weighted-average shares outstanding
223,381

 
220,648

 
223,055

 
220,596

Basic earnings per share
$
0.62

 
$
0.11

 
$
0.74

 
$
0.46

Diluted earnings per share
$
0.62

 
$
0.11

 
$
0.74

 
$
0.46


 
Diluted earnings per share does not reflect options to purchase an aggregate of 2.4 million shares for each of the quarter and six months ended June 30, 2013, respectively, because the effect of including them would have been antidilutive. There were no antidilutive shares for the quarter and six months ended June 30, 2014.