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EMPLOYEE BENEFIT PLANS (Details) - 401(k) Plan [Member] - Artesian Resources [Member] - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Retirement Benefits, Description [Abstract] |  |  |
Percentages of contribution of eligible salaries and wages by Artesian Resources | 2.00% |  |
Percentages of matched employee contributions | 6.00% |  |
Gross pay rate of matched employee contributions | 50.00% |  |
Percentages of additional contribution the Company can make from eligible salaries and wages | 3.00% |  |
Entity contributions and administrative fees | $ 1.2 | $ 1.1 | $ 1.1
Maximum [Member] |  |  |
Retirement Benefits, Description [Abstract] |  |  |
Percentages of additional contribution of eligible salaries and wages by Artesian Resources | 6.00% |  |

X
- Definition Additional percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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Namespace Prefix: | artna_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents gross pay rate of matched employee contributions. + References No definition available. + Details
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Namespace Prefix: | artna_
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Balance Type: | na
Period Type: | duration

X
- Definition Amount of administrative expense incurred by defined contribution plan. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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X
- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
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- References No definition available. + Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=srt_ParentCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
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