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Fair Value of Financial Assets and Liabilities (Tables)
3 Months Ended
Mar. 31, 2013
Fair Value of Financial Assets and Liabilities [Abstract]  
Fair value and the carrying value of long-term debt
                                 
    March 31, 2013     December 31, 2012  
    Fair Value     Carrying Value     Fair Value     Carrying Value  

Long-term debt and related current maturities

  $ 16,261     $ 16,261     $ 9,573     $ 9,573