EMPLOYEE BENEFIT PLANS (Details) - 401(k) Plan [Member] - Artesian Resources [Member] - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
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%
Entity contributions and administrative fees	$ 1.2	$ 1.4	$ 1.3
Maximum [Member]
Retirement Benefits, Description [Abstract]
Percentages of additional contribution of eligible salaries and wages by Artesian Resources	6.00%

Represents gross pay rate of matched employee contributions.

No definition available.

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Namespace Prefix:	artna_
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Period Type:	duration

Amount of administrative expense incurred by defined contribution plan.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Percentage employer matches of the employee's percentage contribution matched.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
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Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

No definition available.

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Data Type:	na
Balance Type:
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Name:	srt_ConsolidatedEntitiesAxis=srt_ParentCompanyMember
Namespace Prefix:
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Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
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Balance Type:
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