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COMMITMENTS AND CONTINGENCIES (Details) (USD $)
 12 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2012
Litigation with Chester Water Authority [Member]
Dec. 31, 2011
Litigation with Chester Water Authority [Member]
Oct. 31, 1997
Artesian Water [Member]
Dec. 31, 2012
Artesian Water [Member]
gal
Dec. 31, 2011
Artesian Water [Member]
Dec. 31, 2005
Artesian Water [Member]
Dec. 31, 2012
Artesian Water [Member]
Agreement One [Member]
Dec. 31, 2011
Artesian Water [Member]
Agreement One [Member]
Dec. 31, 2010
Artesian Water [Member]
Agreement One [Member]
Dec. 31, 2003
Artesian Resources [Member]
Dec. 31, 2012
Artesian Wastewater [Member]
acre
Dec. 31, 2011
Artesian Wastewater [Member]
Dec. 31, 2010
Artesian Wastewater [Member]
Dec. 31, 2011
Artesian Water Maryland [Member]
Leases [Abstract]                                  
Operating lease period           33 years                      
Rental payments                   $ 15,400 $ 15,300 $ 12,700   $ 41,000 $ 40,000 $ 40,000  
Adjustment Factor                           2.00%      
Easement agreement period                         40 years        
Easement payments 32,000 31,000 30,000                            
Area of land use as per perpetual agreement (in acres)                           460      
Minimum rentals payment per year                           40,000      
Termination Period                           180 days      
Summary of minimum annual rental payments related to operating leases [Abstract]                                  
2013 69,000                                
2014 50,000                                
2015 52,000                                
2016 53,000                                
2017 54,000                                
2018 through 2043 1,651,000                                
Total 1,929,000                                
Interconnections [Abstract]                                  
Minimum purchase requirements of water             1,459,000,000                    
Minimum reduced purchase requirements of water             1,095,000,000                    
Summary of minimum annual purchase commitments for all interconnection agreements [Abstract]                                  
2013 3,780,000                                
2014 3,780,000                                
2015 3,780,000                                
2016 3,791,000                                
2017 3,780,000                                
2018 through 2021 15,132,000                                
Total 34,043,000                                
Expenses for purchased water 4,000,000 3,800,000 3,600,000                            
Other Commitments [Abstract]                                  
Agreement period               2 years 6 years                
Commitment amount               623,000 1,900,000                
Tank painting expense 403,000 344,000 364,000                            
Number of agreements with Utility Service Co                                 2
Summary of other commitment [Abstract]                                  
2013             660,000                    
2014             580,000                    
2015             430,000                    
2016             905,000                    
2017             1,455,000                    
Total             4,030,000                    
Litigation [Abstract]                                  
Accrued expenses $ 3,430,000 $ 2,253,000   $ 2,200,000 $ 1,100,000