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Earnings Per Share and Capital Structure Earnings Per Share and Capital Structure (Tables)
 3 Months Ended
Mar. 31, 2013
Earnings Per Share and Capital Structure [Abstract]  
Computation of Basic and Diluted Earnings Per Share [Table Text Block]
The following table sets forth the computation of basic and diluted earnings per share (EPS):

 
Three Months Ended
March 31,
 
2013
 
2012
 
(in thousands, except per share data)
Net income available to common shareholders
$
2,570

 
$
25,353

 
 
 
 
Weighted average common shares outstanding - Basic
39,420

 
39,913

Dilutive effect of stock-based awards
350

 
303

Weighted average common shares outstanding - Diluted
39,770

 
40,216

Earnings per common share - Basic
$
0.07

 
$
0.64

Earnings per common share - Diluted
$
0.06

 
$
0.63