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Debt (Tables)
9 Months Ended
Sep. 30, 2011
Debt [Abstract] 
Summary of outstanding debt balances
The following is a summary of the Company's outstanding debt balances (in thousands of dollars):

   
September 30,
  
December 31,
 
   
2011
  
2010
 
        
Long-term debt
 $20,000  $-