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Debt (Tables)
9 Months Ended
Sep. 30, 2014
Debt Disclosure [Abstract]  
Debt [Table Text Block]
Long-term debt consisted of the following:
 
 
September 30,
2014
 
December 31,
2013
 
(thousands)
Asset-based revolving credit facility
$

 
$

6.375% senior notes
299,990

 
299,990

Unamortized premium on 6.375% senior notes
1,476

 
1,623

Long-term debt
$
301,466

 
$
301,613