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Long-term Debt (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Long-term Debt    
Total long-term debt including current portion at liquidation value $ 825,557 $ 836,968
Total long-term debt at recorded value 821,498 832,233
Senior credit facility [Member]
   
Long-term Debt    
Secured Debt 460,557 471,968
Borrowing availability under our senior credit facility 40,000 31,000
10 1/2% senior secured second lien notes at liquidation value [Member]
   
Long-term Debt    
Secured Debt 365,000 365,000
Less unamortized discount on Notes $ (4,059) $ (4,735)