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Long-term Debt (Tables)
 12 Months Ended
Dec. 31, 2011
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments [Table Text Block]
Long-term debt consists of the following (amounts in thousands):
 
December 31, 2011
 
December 31, 2010
Senior secured revolving credit facility
$
—

 
$
37,750

Senior Notes
417,747

 
240,080

Subordinated notes payable and other
1,853

 
3,108

 
419,600

 
280,938

Less current portion
(872
)
 
(1,408
)
 
$
418,728

 
$
279,530