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Commitments and Contingent Liabilities (Tables)
3 Months Ended
Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]  
Schedule of purchased water cost

Purchased water costs are shown below:

 

   (In Thousands)
   Three Months Ended
   March 31,
   2017  2016
       
Treated  $779   $801 
Untreated   659    666 
Total Costs  $1,438   $1,467