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Net Income Per Common Share Level 3 Net Income Per Common Share (Tables)
3 Months Ended
Mar. 31, 2013
Earnings Per Share [Abstract]  
Net Income Per Common Share
The following table sets forth the computation of basic and diluted net income per common share:

 
Three Months Ended
March 31
 
2013
 
2012
 
(thousands)
Net income
$
80,836

 
$
1,668

Weighted average common shares outstanding during the period (for basic calculation)
37,569

 
29,700

Dilutive effect of other potential common shares

 

Weighted average common shares and potential common shares (for diluted calculation)
37,569

 
29,700

 
 
 
 
Net income per common share - Basic
$
2.15

 
$
0.06

Net income per common share - Diluted
$
2.15

 
$
0.06