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GEOGRAPHIC CONCENTRATION OF CUSTOMERS (Details)
 12 Months Ended
Dec. 31, 2015
County
Customer
Concentration Risk [Line Items]  
Number of counties in which water utility service provided | County 3
Artesian Water [Member]  
Concentration Risk [Line Items]  
Number of customers 81,400
Artesian Water Maryland [Member]  
Concentration Risk [Line Items]  
Number of customers 2,300
Artesian Water Pennsylvania [Member]  
Concentration Risk [Line Items]  
Number of customers 40
Artesian Wastewater [Member]  
Concentration Risk [Line Items]  
Number of customers 1,500