Name:	artna_MinimumNumberOfDaysCustomersServicesInvoicedInAdvance
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The minimum number of days due for accounts receivable after invoicing from regulated contract customers, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	artna_MinimumNumberOfDaysDueForAccountsReceivableFromRegulatedContractCustomers
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The minimum number of days due for accounts receivable after invoicing from Service Line Protection Plans (SLP) customers, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	artna_MinimumNumberOfDaysDueForAccountsReceivableFromServiceLineProtectionPlanCustomer
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Number of operation contracts paid in advance.

No definition available.

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Balance Type:	na
Period Type:	duration

The total amount of revenue recognized for the period from rental income and other revenue.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

Reserve or reduction to revenue from interim temporary rates.

No definition available.

Name:	artna_ReserveOrReductionToRevenue
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- References

No definition available.

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- References

No definition available.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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Name:	us-gaap_PublicUtilityRegulatedOrUnregulatedStatusAxis=us-gaap_RegulatedOperationMember
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Name:	srt_ProductOrServiceAxis=artna_ConsumptionChargesMember
Namespace Prefix:
Data Type:	na
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Name:	srt_ProductOrServiceAxis=artna_FixedFeesMember
Namespace Prefix:
Data Type:	na
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Period Type:

Name:	srt_ProductOrServiceAxis=artna_ServiceChargesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_ProductOrServiceAxis=artna_DistributionSystemImprovementChargeMember
Namespace Prefix:
Data Type:	na
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Name:	srt_ProductOrServiceAxis=artna_MeteredWastewaterServicesMember
Namespace Prefix:
Data Type:	na
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Period Type:

Name:	srt_ProductOrServiceAxis=artna_IndustrialWastewaterServicesMember
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Data Type:	na
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Namespace Prefix:
Data Type:	na
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Name:	srt_ProductOrServiceAxis=artna_ServiceLineProtectionPlansMember
Namespace Prefix:
Data Type:	na
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Name:	srt_ProductOrServiceAxis=artna_ContractOperationsMember
Namespace Prefix:
Data Type:	na
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Name:	srt_ProductOrServiceAxis=artna_DesignAndInstallationMember
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