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Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

No definition available.

Name:	us-gaap_PurchaseObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Minimum amount of purchase arrangement maturing in the next fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments.

No definition available.

Name:	us-gaap_PurchaseObligationDueInNextTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Minimum amount of purchase arrangement maturing in the second fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments.

No definition available.

Name:	us-gaap_PurchaseObligationDueInSecondYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Remaining recovery period of regulatory assets for which no return on investment during recovery period is provided, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 980
-SubTopic 340
-Section 55
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82849221&loc=d3e44360-110383

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 980
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382

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Action level for lead at the customer's tap as established by the Lead and Copper Rule issued by the U.S. Environmental Protection Agency in parts per billion.

No definition available.

Name:	yorw_ActionLevelForLead
Namespace Prefix:	yorw_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Amount of exceedance of the action level for lead at the customer's tap as established by the Lead and Copper Rule issued by the U.S. Environmental Protection Agency in parts per billion.

No definition available.

Name:	yorw_AmountOfExceedance
Namespace Prefix:	yorw_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Costs associated with replacing all of the remaining company-owned lead service lines incurred during the period.

No definition available.

Name:	yorw_CostsForCompanyOwnedLeadServiceLineReplacements
Namespace Prefix:	yorw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Additional costs to be incurred for replacing all of the remaining company-owned lead service lines integrated into the Company's annual capital budgets.

No definition available.

Name:	yorw_CostsForCompanyOwnedLeadServiceLineReplacementsToBeIncurred
Namespace Prefix:	yorw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Costs associated with replacing all of the remaining customer-owned lead service lines connected to company-owned lead service lines incurred during the period.

No definition available.

Name:	yorw_CostsForCustomerOwnedLeadServiceLineReplacements
Namespace Prefix:	yorw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Additional costs to be incurred for replacing all of the remaining customer-owned lead service lines connected to company-owned lead service lines recorded as a regulatory asset.

No definition available.

Name:	yorw_CostsForCustomerOwnedLeadServiceLineReplacementsToBeIncurred
Namespace Prefix:	yorw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Additional costs to be incurred for replacing all of the remaining customer-owned lead service lines regardless of the material used for company-owned lead service lines recorded as a regulatory asset.

No definition available.

Name:	yorw_CostsForCustomerOwnedLeadServiceLineReplacementsToBeIncurredRegardlessOfMaterialUsedForCompanyOwnedLeadServiceLines
Namespace Prefix:	yorw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Percentage of persons employed by the Entity under union contract.

No definition available.

Name:	yorw_EntityPercentageOfUnionEmployees
Namespace Prefix:	yorw_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Monthly credit provided to affected customers to flush their line in order to reduce any lead content until their lead service line has been replaced.

No definition available.

Name:	yorw_MonthlyCreditProvidedToAffectedCustomersToFlushLine
Namespace Prefix:	yorw_
Data Type:	us-types:flowItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

Name:	yorw_NumberOfEmployeesAbstract
Namespace Prefix:	yorw_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Number of high-risk homes tested for lead at the customer's tap by the Company under the Lead and Copper Rule issued by the U.S. Environmental Protection Agency.

No definition available.

Name:	yorw_NumberOfHighRiskHomesTestedForLead
Namespace Prefix:	yorw_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Number of lead customer-owned service lines to be replaced annually whenever they are discovered.

No definition available.

Name:	yorw_NumberOfLeadCustomerOwnedServiceLinesToBeReplacedAnnually
Namespace Prefix:	yorw_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Number of samples that can exceed the action level for lead at the customer's tap as established by the Lead and Copper Rule issued by the U.S. Environmental Protection Agency.

No definition available.

Name:	yorw_NumberOfSamplesThatCanExceedActionLevel
Namespace Prefix:	yorw_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Number of samples that exceeded the action level for lead at the customer's tap as established by the Lead and Copper Rule issued by the U.S. Environmental Protection Agency.

No definition available.

Name:	yorw_NumberOfSamplesThatExceededActionLevel
Namespace Prefix:	yorw_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Percentage of company-owned service lines in the distribution system that are lead.

No definition available.

Name:	yorw_PercentageOfCompanyOwnedLeadServiceLines
Namespace Prefix:	yorw_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Percentage of company-owned lead service lines required to be replaced annually upon exceedance of the action level for lead at the customer's tap as established by the Lead and Copper Rule issued by the U.S. Environmental Protection Agency.

No definition available.

Name:	yorw_PercentageOfCompanyOwnedLeadServiceLinesToBeReplacedAnnually
Namespace Prefix:	yorw_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

The remaining minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

No definition available.

Name:	yorw_PurchaseObligationRemainingMinimumAmountCommitted
Namespace Prefix:	yorw_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Period of time within which the Company will provide water testing and flushing credits for customers with company-owned lead service lines, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	yorw_TermForWaterTestingExpenseAndFlushingCredits
Namespace Prefix:	yorw_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Term of tariff modification involving the replacement of lead customer-owned service lines that are discovered when the Company replaces its lead service lines, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	yorw_TermOfTariffModificationToReplaceCustomerOwnedLeadServiceLines
Namespace Prefix:	yorw_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Term of tariff modification involving the replacement of lead customer-owned service lines regardless of material used for company-owned service lines, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	yorw_TermOfTariffModificationToReplaceCustomerOwnedLeadServiceLinesRegardlessOfMaterialUsedForCompanyOwnedServiceLines
Namespace Prefix:	yorw_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Period of time within which the Company will replace all of the remaining company-owned lead service lines, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	yorw_TermToReplaceAllRemainingCompanyOwnedLeadServiceLines
Namespace Prefix:	yorw_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Period of time within which the Company will replace all of the remaining customer-owned lead service lines, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	yorw_TermToReplaceAllRemainingCustomerOwnedLeadServiceLines
Namespace Prefix:	yorw_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Expense to test water and credits to flush water lines for customers with company-owned lead service lines during the period.

No definition available.

Name:	yorw_WaterTestingExpenseAndFlushingCredits
Namespace Prefix:	yorw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Name:	us-gaap_OtherCommitmentsAxis=yorw_CompanyOwnedLeadServiceLinesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_OtherCommitmentsAxis=yorw_CustomerOwnedLeadServiceLinesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=us-gaap_CapitalAdditionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
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