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Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2012
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
Basic and diluted earnings (loss) per common share ("EPS") are calculated as follows:
  
Quarter ended June 30,
 
Six months ended June 30,
(In thousands, except per share amounts)
2012
 
2011
 
2012
 
2011
Net income (loss)
$
5,508

 
$
77,775

 
$
(5,634
)
 
$
101,977

 
 
 
 
 
 
 
 
Weighted average common shares outstanding (used to calculate basic EPS)
45,945

 
45,422

 
45,892

 
45,376

Dilutive effect of stock awards
279

 
858

 
—

 
872

Weighted average common shares outstanding (used to calculate diluted EPS)
46,224

 
46,280

 
45,892

 
46,248

 
 
 
 
 
 
 
 
Earnings (loss) per common share – basic
$
0.12

 
$
1.71

 
$
(0.12
)
 
$
2.25

Earnings (loss) per common share – diluted
$
0.12

 
$
1.68

 
$
(0.12
)
 
$
2.21