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REGULATORY PROCEEDINGS (Details) (USD $)
 9 Months Ended 0 Months Ended 3 Months Ended 6 Months Ended 9 Months Ended 6 Months Ended
Sep. 30, 2014
Sep. 30, 2014
Delaware [Member]
Nov. 13, 2014
Artesian Water [Member]
Nov. 30, 2013
Artesian Water [Member]
May 31, 2013
Artesian Water [Member]
Nov. 30, 2012
Artesian Water [Member]
Sep. 30, 2014
Artesian Water [Member]
Sep. 30, 2013
Artesian Water [Member]
Jun. 30, 2014
Artesian Water [Member]
Sep. 30, 2014
Artesian Water [Member]
Sep. 30, 2013
Artesian Water [Member]
Jun. 10, 2014
Artesian Water [Member]
Apr. 11, 2014
Artesian Water [Member]
Jun. 30, 2014
Artesian Wastewater [Member]
Oct. 08, 2013
Artesian Wastewater [Member]
Jan. 18, 2013
Artesian Wastewater [Member]
Rate Proceedings [Abstract]                                
Maximum temporary annual rate increase subject to 15% gross water sales limitation   $ 2,500,000                            
Percentage of gross water sales maximum temporary annual rate increase subject to $2.5 million limitation (in hundredths) 15.00%                              
Period to complete rate case by law (in months)   7 months                            
Percentage of rate relief allowed should a rate case not complete, maximum (in hundredths) 15.00%                              
Percentage of revenue increase in a filed request to implement new rates (in hundredths)                         15.90%     34.80%
Amount of annual revenue increase in a filed request to implement new rates                         10,000,000     343,000
Increase in annual revenue expected from rate increase application approval                             174,000  
Return on Equity (in hundredths)                           10.00%    
Incremental Increase to Customers                                 
Percentage increase in annual operating revenue due to temp rate increase in effect                       3.98%        
Annualized operating revenue increase due to temp rate increase in effect                       2,500,000        
Other Proceedings [Abstract]                                
Distribution System Improvement Charge rate increase applied between base rate filings, maximum (in hundredths)                  7.50%              
Distribution System Improvement Charge rate increase maximum within a 12-month period (in hundredths)                 5.00%              
Percentage of Distribution System Improvement Charges annual rate increase application filed by company to regulatory (in hundredths)     7.17% 3.32% 2.09% 1.59%                    
Increase in revenue due to DSIC rate increase application, annually     4,500,000 4,900,000 2,000,000 4,600,000                    
Revenue earned in DSIC rate increases                $ 336,000   $ 789,000 $ 839,000