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Long-term Debt (Tables)
 6 Months Ended
Jun. 30, 2012
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments
Long-term debt consists of the following (amounts in thousands):
 
June 30, 2012
 
December 31, 2011
Senior secured revolving credit facility
$
35,000

 
$
—

Senior notes
418,170

 
417,747

Other notes payable
991

 
1,853

 
454,161

 
419,600

Less current portion
(871
)
 
(872
)
 
$
453,290

 
$
418,728