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Commitments and Contingent Liabilities (Tables)
6 Months Ended
Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]  
Schedule of purchased water cost

Purchased water costs are shown below:

 

   (In Thousands)
   Three Months Ended  Six Months Ended
   June 30,  June 30,
   2018  2017  2018  2017
             
Treated  $703   $795   $1,591   $1,574 
Untreated   850    573    1,780    1,232 
Total Costs  $1,553   $1,368   $3,371   $2,806