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Long-Term Debt (Tables)
9 Months Ended
Sep. 30, 2011
Long-Term Debt [Abstract] 
Long-term debt
                 
    September 30,     December 31,  
    2011     2010  
Bank Borrowings
  $     $  
7-1/8% senior notes due 2017
    250,000       250,000  
8-7/8% senior notes due 2020
    221,809       221,624  
 
           
Long-Term Debt
  $ 471,809     $ 471,624