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EMPLOYEE BENEFIT PLANS (Details)
12 Months Ended
Dec. 31, 2016
USD ($)
Age
Retiree
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Supplemental Pension Plan [Abstract]      
Minimum age required for additional benefits to individuals | Age 50    
Term of matching contribution 5 years    
401(k) Plan [Member] | Artesian Resources [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Percentages of contribution of eligible salaries and wages by Artesian Resources 2.00%    
Percentages of matched employee contributions 6.00%    
Entity contributions and administrative fees $ 850,000 $ 1,000,000 $ 808,000
401(k) Plan [Abstract]      
Gross pay rate of matched employee contributions 50.00%    
Percentages of additional contribution of eligible salaries and wages by Artesian Resources 3.00% 1.00%  
Supplemental Pension Plan [Member] | Artesian Water [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Percentages of contribution of eligible salaries and wages by Artesian Resources 2.00%    
Percentages of matched employee contributions 6.00%    
Entity contributions and administrative fees $ 227,000 $ 243,000 244,000
Supplemental Pension Plan [Member] | Artesian Water [Member] | Employee Period of Service 1 [Member]      
Supplemental Pension Plan [Abstract]      
Contribution per dollar deferred 3    
Supplemental Pension Plan [Member] | Artesian Water [Member] | Employee Service Period 2 [Member]      
Supplemental Pension Plan [Abstract]      
Contribution per dollar deferred 4    
Supplemental Pension Plan [Member] | Artesian Water [Member] | Employee Service Period 3 [Member]      
Supplemental Pension Plan [Abstract]      
Contribution per dollar deferred 5    
Postretirement Benefit Plan [Member] | Artesian Water [Member]      
Postretirement Benefit Plan [Abstract]      
Expense incurred under the plan $ 80,000 113,000 $ 121,000
Number of eligible retirees | Retiree 3    
Estimated post retirement liability $ 186,000 $ 329,000  
Expected contributions in next fiscal year by employer $ 37,000