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Capitalization (Tables)
9 Months Ended
Sep. 30, 2014
Capitalization [Abstract]  
Schedule of carrying amount and fair value of bonds

The carrying amount and fair value of the Company's bonds were as follows:

 

   

September 30, 2014

  December 31, 2013
    Carrying   Fair   Carrying   Fair
    Amount   Value   Amount   Value
First Mortgage Bonds   $ 88,628     $ 88,532     $ 87,471     $ 79,733  
SRF Bonds   $ 540     $ 542     $ 625     $ 628