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Fair Value of Financial Assets and Liabilities (Tables)
6 Months Ended
Jun. 30, 2012
Fair Value of Financial Assets and Liabilities [Abstract]  
Fair value and the carrying value of long-term debt
                                 
    June 30, 2012     December 31, 2011  
    Fair Value     Carrying Value     Fair Value     Carrying Value  

Long-term debt and related current maturities

  $ 25,982     $ 25,917     $ 28,659     $ 28,592