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GENERAL (Details) gal / d in Millions | 9 Months Ended
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Sep. 30, 2025 gal / d Subsidiary Facility Plan
GENERAL [Abstract] |
Number of subsidiaries not regulated | Subsidiary | 2
Artesian Utility [Member] |
GENERAL [Abstract] |
Initial contract period of operating wastewater treatment facilities in middletown | 20 years
Number of wastewater treatment systems facility operations in middletown | Facility | 3
Capacity of wastewater treatment facilities | gal / d | 3.8
Number of protection plans offered to customers | Plan | 3

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | artna_
Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition Minimum capacity of wastewater treatment facilities per day. + References No definition available. + Details
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Data Type: | dtr:flowItemType
Balance Type: | na
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- Definition Contract period of operating wastewater treatment facilities. + References No definition available. + Details
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- Definition Represents the number of protection plans offered to customers by the entity. + References No definition available. + Details
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Period Type: | duration

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- Definition Number of subsidiaries not regulated. + References No definition available. + Details
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Balance Type: | na
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- Definition Number of wastewater treatment stations that are currently in operation for a specific facility or area. + References No definition available. + Details
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Namespace Prefix: | artna_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |