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GEOGRAPHIC CONCENTRATION OF CUSTOMERS	12 Months Ended
GEOGRAPHIC CONCENTRATION OF CUSTOMERS	Dec. 31, 2011
Geographic Concentration of Customers [Abstract]
GEOGRAPHIC CONCENTRATION OF CUSTOMERS	NOTE 13 GEOGRAPHIC CONCENTRATION OF CUSTOMERS Artesian Water, Artesian Water Pennsylvania and Artesian Water Maryland provide water utility service to customers within their established service territory in all three counties of Delaware and in portions of Pennsylvania and Maryland, pursuant to rates filed with and approved by the DEPSC, the PAPUC and the MDPSC. As of December 31, 2011, Artesian Water was serving 78,600 customers, Artesian Water Pennsylvania was serving 38 customers and Artesian Water Maryland was serving 2,000 customers. Artesian Wastewater began providing wastewater services to a community in Sussex County, Delaware in July 2005. The DEPSC approved the temporary rates for this community on July 15, 2005, and on January 24, 2006, approved the rates and tariff. As of December 31, 2011, Artesian Wastewater was serving 885 customers, the majority of which are located in Sussex County, Delaware.