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Level 3 Net Income Per Common Share (Tables)
 6 Months Ended
Jun. 30, 2014
Earnings Per Share [Abstract]  
Net Income Per Common Share [Table Text Block]
The following table sets forth the computation of basic and diluted net income per common share:

 
Three Months Ended
June 30
 
Six Months Ended
June 30
 
2014
 
2013
 
2014
 
2013
 
(thousands, except per-share data)
Net income
$
26,418

 
$
10,412

 
$
31,983

 
$
91,248

Weighted average common shares outstanding during the period (for basic calculation)
39,420

 
43,229

 
39,399

 
40,415

Dilutive effect of other potential common shares
43

 
4

 
59

 
2

Weighted average common shares and potential common shares (for diluted calculation)
39,463

 
43,233

 
39,458

 
40,417

 
 
 
 
 
 
 
 
Net income per common share - Basic
$
0.67

 
$
0.24

 
$
0.81

 
$
2.26

Net income per common share - Diluted
$
0.67

 
$
0.24

 
$
0.81

 
$
2.26