XML 53 R40.htm IDEA: XBRL DOCUMENT
v3.22.4

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Part 1 (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Summary of utility plant comprises [Abstract] |  |  |
Utility plant, gross | $ 840,985 | $ 749,816 |
Less - accumulated depreciation | 172,954 | 159,385 |
Utility plant, net | $ 668,031 | $ 590,431 |
Depreciation and Amortization [Abstract] |  |  |
Depreciation rates of water utility plant | 2.16% | 2.17% | 2.23%
Minimum [Member] |  |  |
Depreciation and Amortization [Abstract] |  |  |
Amortization period of other deferred assets | 20 years |  |
Maximum [Member] |  |  |
Depreciation and Amortization [Abstract] |  |  |
Amortization period of other deferred assets | 24 years |  |
Property Held for Future Use [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 0 years |  |
Utility plant, gross | $ 4,489 | $ 5,536 |
Construction in Progress [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 0 years |  |
Utility plant, gross | $ 34,213 | 18,481 |
Utility plant in service-Water [Member] | Mains [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 81 years |  |
Utility plant, gross | $ 338,368 | 320,767 |
Utility plant in service-Water [Member] | Services [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 39 years |  |
Utility plant, gross | $ 56,396 | 53,210 |
Utility plant in service-Water [Member] | Storage Tanks [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 76 years |  |
Utility plant, gross | $ 34,567 | 29,972 |
Utility plant in service-Water [Member] | Meters [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 26 years |  |
Utility plant, gross | $ 29,720 | 28,778 |
Utility plant in service-Water [Member] | Hydrants [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 60 years |  |
Utility plant, gross | $ 17,751 | 16,789 |
Utility plant in service-Water [Member] | Intangible plant [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 0 years |  |
Utility plant, gross | $ 140 | 140 |
Utility plant in service-Water [Member] | Source of supply plant [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Utility plant, gross | $ 25,223 | 25,045 |
Utility plant in service-Water [Member] | Source of supply plant [Member] | Minimum [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 45 years |  |
Utility plant in service-Water [Member] | Source of supply plant [Member] | Maximum [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 85 years |  |
Utility plant in service-Water [Member] | Pumping and water treatment plant [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Utility plant, gross | $ 116,915 | 109,087 |
Utility plant in service-Water [Member] | Pumping and water treatment plant [Member] | Minimum [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 8 years |  |
Utility plant in service-Water [Member] | Pumping and water treatment plant [Member] | Maximum [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 62 years |  |
Utility plant in service-Water [Member] | General plant [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Utility plant, gross | $ 65,632 | 62,604 |
Utility plant in service-Water [Member] | General plant [Member] | Minimum [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 5 years |  |
Utility plant in service-Water [Member] | General plant [Member] | Maximum [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 31 years |  |
Utility plant in service-Wastewater [Member] | Intangible plant [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 0 years |  |
Utility plant, gross | $ 117 | 116 |
Utility plant in service-Wastewater [Member] | General plant [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Utility plant, gross | $ 1,845 | 1,665 |
Utility plant in service-Wastewater [Member] | General plant [Member] | Minimum [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 5 years |  |
Utility plant in service-Wastewater [Member] | General plant [Member] | Maximum [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 31 years |  |
Utility plant in service-Wastewater [Member] | Treatment and Disposal Plant [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Utility plant, gross | $ 66,420 | 43,725 |
Utility plant in service-Wastewater [Member] | Treatment and Disposal Plant [Member] | Minimum [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 21 years |  |
Utility plant in service-Wastewater [Member] | Treatment and Disposal Plant [Member] | Maximum [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 81 years |  |
Utility plant in service-Wastewater [Member] | Collection Mains & Lift Stations [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 81 years |  |
Utility plant, gross | $ 49,189 | $ 33,901 |
Artesian Water [Member] |  |  |
Utility Plant [Abstract] |  |  |
Capitalized rate of AFUDC | 6.90% | 6.70% | 7.00%
Artesian Wastewater [Member] |  |  |
Utility Plant [Abstract] |  |  |
Capitalized rate of AFUDC | 6.90% | 6.40% | 6.30%
Tidewater Environmental Services Inc [Member] |  |  |
Utility Plant [Abstract] |  |  |
Capitalized rate of AFUDC | 5.70% |  |

X
- Definition Represents amortization period of other deferred assets. + References No definition available. + Details
Name: | artna_AmortizationPeriodOfOtherDeferredAssets
Namespace Prefix: | artna_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents capitalize rate of allowance for funds used during construction. + References No definition available. + Details
Name: | artna_CapitalizeRateOfAllowanceForFundsUsedDuringConstruction
Namespace Prefix: | artna_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents depreciation rates of water utility plant during the period. + References No definition available. + Details
Name: | artna_DepreciationRatesOfWaterUtilityPlant
Namespace Prefix: | artna_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | artna_UtilityPlantAbstract
Namespace Prefix: | artna_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DepreciationAndAmortizationAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period end book value of accumulated depreciation on property, plant and equipment (PPE) that is owned by the regulated operations of the public utility. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Period end amount of total net PPE. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNetAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period end amount of total gross PPE. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=artna_PropertyHeldForFutureUseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ConstructionInProgressMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsegmentsAxis=us-gaap_WaterPlantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=artna_MainsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=artna_ServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=artna_StorageTanksMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=artna_MetersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=artna_HydrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityAxis=artna_IntangiblePlantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityAxis=artna_SourceOfSupplyPlantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityAxis=artna_PumpingAndWaterTreatmentPlantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityAxis=artna_GeneralPlantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsegmentsAxis=artna_UtilityPlantInServiceWastewaterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityAxis=artna_TreatmentAndDisposalPlantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityAxis=artna_CollectionMainsAndLiftStationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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