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Earnings Per Share and Capital Structure Earnings Per Share and Capital Structure (Tables)
9 Months Ended
Sep. 30, 2011
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 (loss) per share (EPS):

 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
2011
 
2010
 
2011
 
2010
 
(in thousands, except per share data)
Net income (loss) available to common shareholders
$
(517,082
)
 
$
27,639

 
$
(455,526
)
 
$
78,200

 
 
 
 
 
 
 
 
Weighted average common shares outstanding - Basic
40,725

 
40,400

 
40,648

 
40,307

Dilutive effect of convertible notes
—

 
—

 
—

 
138

Dilutive effect of stock-based awards
—

 
428

 
—

 
505

Weighted average common shares outstanding - Diluted
40,725

 
40,828

 
40,648

 
40,950

Earnings (loss) per common share - Basic
$
(12.70
)
 
$
0.68

 
$
(11.21
)
 
$
1.94

Earnings (loss) per common share - Diluted
$
(12.70
)
 
$
0.68

 
$
(11.21
)
 
$
1.91