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REGULATORY PROCEEDINGS (Details) (USD $)
 3 Months Ended 12 Months Ended 3 Months Ended
Mar. 31, 2013
Mar. 31, 2013
Delaware [Member]
Mar. 31, 2013
Artesian Water [Member]
Mar. 31, 2012
Artesian Water [Member]
Dec. 31, 2013
Artesian Water [Member]
Dec. 31, 2012
Artesian Water [Member]
Nov. 30, 2012
Artesian Water [Member]
May 31, 2012
Artesian Water [Member]
Mar. 31, 2013
Artesian Water Maryland [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)                   34.80%
Amount of annual revenue increase in a filed request to implement new rates                   343,000
Service Territory Expansion Proceedings [Abstract]                    
Number of customers served by CECO water systems                 200  
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)             1.45% 0.14%    
Increase in revenue due to DSIC rate increase application, annually         5,600,000 486,000        
Revenue earned in DSIC rate increases     $ 258,000 $ 0