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Long-Term Debt and Short-Term Borrowings, Debt Covenants and Restrictions (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)
Long-Term Debt and Short-Term Borrowings [Abstract]
Maximum borrowing percentage of utility plant	60.00%
Base amount added to annual net income to determine restriction on dividends and stock acquisition	$ 1,500

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- References

No definition available.

+ Details

Name:	us-gaap_DebtDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

Base amount as of December 31, 1982 to which annual net income is added to calculate the restriction on cumulative payments for dividends and acquisition of stock.

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No definition available.

+ Details

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

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- Definition

Element represents the maximum borrowing percentage of utility plant.

+ References

No definition available.

+ Details

Name:	yorw_MaximumBorrowingPercentageOfUtilityPlant
Namespace Prefix:	yorw_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration