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DEBT (Details) (USD $)	2 Months Ended	12 Months Ended
	Aug. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Long-term debt consists of [Abstract]
Sub-total of long-term debt		107,368,000	$ 108,257,000
Less: current maturities (principal amount)		1,111,000	1,718,000
Total long-term debt		106,257,000	106,539,000
Payments of principal amounts due during the next five years and thereafter [Abstract]
2013		1,111,000
2014		1,187,000
2015		1,211,000
2016		1,235,000
2017		1,260,000
Thereafter		101,364,000
Promissory Note, variable interest, due 08/01/2012 [Member]
Long-term debt consists of [Abstract]
Sub-total of long-term debt		0	580,000
First mortgage bonds [Member]
Long-term debt consists of [Abstract]
Sub-total of long-term debt		98,000,000	98,600,000
Payments of principal amounts due during the next five years and thereafter [Abstract]
2013		600,000
2014		600,000
2015		600,000
2016		600,000
2017		600,000
Thereafter		95,000,000
First mortgage bonds [Member] | Series O, 8.17%, due 12/29/2020 [Member]
Long-term debt consists of [Abstract]
Sub-total of long-term debt		20,000,000	20,000,000
First mortgage bonds [Member] | Series P, 6.58%, due 01/31/2018 [Member]
Long-term debt consists of [Abstract]
Sub-total of long-term debt		25,000,000	25,000,000
First mortgage bonds [Member] | Series Q, 4.75%, due 12/01/2043 [Member]
Long-term debt consists of [Abstract]
Sub-total of long-term debt		15,400,000	15,400,000
First mortgage bonds [Member] | Series R, 5.96%, due 12/31/2028 [Member]
Long-term debt consists of [Abstract]
Sub-total of long-term debt		25,000,000	25,000,000
First mortgage bonds [Member] | Series S, 6.73%, due 12/31/2033 [Member]
Long-term debt consists of [Abstract]
Sub-total of long-term debt		12,600,000	13,200,000
State revolving fund loans [Member]
Long-term debt consists of [Abstract]
Sub-total of long-term debt		9,368,000	9,077,000
Payments of principal amounts due during the next five years and thereafter [Abstract]
2013		511,000
2014		587,000
2015		611,000
2016		635,000
2017		660,000
Thereafter		6,364,000
State revolving fund loans [Member] | 4.48%, due 08/01/2021 [Member]
Long-term debt consists of [Abstract]
Sub-total of long-term debt		2,410,000	2,624,000
State revolving fund loans [Member] | 3.57%, due 09/01/2023 [Member]
Long-term debt consists of [Abstract]
Sub-total of long-term debt		940,000	1,010,000
State revolving fund loans [Member] | 3.64%, due 05/01/2025 [Member]
Long-term debt consists of [Abstract]
Sub-total of long-term debt		1,570,000	1,667,000
State revolving fund loans [Member] | 3.41%, due 02/01/2031 [Member]
Long-term debt consists of [Abstract]
Sub-total of long-term debt		2,936,000	2,993,000
State revolving fund loans [Member] | 3.40%, due 07/01/2032 [Member]
Long-term debt consists of [Abstract]
Sub-total of long-term debt		1,512,000	783,000
Class A Stock [Member]
Line of Credit Facility [Line Items]
Stock issued during the period (in shares)	888,000	99,330	85,600	129,876
Net proceeds from sale of common stock			15,600,000
Citizens Bank [Member] | Artesian Resources [Member]
Line of Credit Facility [Line Items]
Line of credit		40,000,000
Available funds under this line of credit		29,300,000
Expiration date of line of credit		May 30, 2013
Citizens Bank [Member] | LIBOR [Member] | Artesian Resources [Member]
Line of Credit Facility [Line Items]
Variable rate for credit facility		LIBOR
Variable rate of credit facility (in hundredths)		1.00%
CoBank [Member] | Artesian Water [Member]
Line of Credit Facility [Line Items]
Line of credit		20,000,000
Available funds under this line of credit		20,000,000
Expiration date of line of credit		Jan. 14, 2014
CoBank [Member] | Artesian Water Maryland [Member]
Line of Credit Facility [Line Items]
Line of credit		10,000,000
CoBank [Member] | LIBOR [Member] | Artesian Water [Member]
Line of Credit Facility [Line Items]
Variable rate for credit facility		LIBOR
Variable rate of credit facility (in hundredths)		1.50%

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