Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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-Topic 942
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Name Accounting Standards Codification
-Section 50
-Paragraph 4
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-Publisher FASB
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- Definition

Indicates type of variable interest rate on debt instrument.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 470
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
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-Publisher FASB
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- Definition

The percentage points added to the reference rate to compute the variable rate on the interest rate derivative.

+ References

No definition available.

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- Definition

Fixed interest rate related to the interest rate derivative.

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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
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- Definition

The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months.

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- Definition

Percentage of variable interest rate paid by the counterparty on the notional amount of the interest rate derivative.

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No definition available.

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- Definition

The amount reclassified from regulatory assets to interest expense during the period as a result of interest rate swap settlements. The Company uses regulatory accounting treatment rather than hedge accounting to defer the unrealized gains and losses on its interest rate swap. Instead of the effective portion being recorded as other comprehensive income or loss and the ineffective portion being recognized in earnings using the cash flow hedge accounting rules provided by the derivative accounting standards, the entire unrealized swap value is recorded as a regulatory asset. Based on current ratemaking treatment, the Company expects the unrealized gains and losses to be recognized in rates as a component of interest expense as the swap settlements occur. Swap settlements are recorded in the income statement with the hedged item as interest expense.

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The amount of (gains) or losses on an interest rate swap deferred in the period and recorded as a (decrease)/increase in the regulatory asset.

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Net payment rate on interest rate derivative with the counterparty for the period.

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The potential amount payable to the interest rate swap counter party due to certain violations of the terms and conditions of the swap agreement.

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Interest Rate Swap Agreement (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Interest Rate Swap Agreement [Abstract]
Outstanding borrowings	$ 229,800		$ 229,800		$ 208,178
Variable Interest Rate, Type [Extensible Enumeration]			yorw:DailySimpleSecuredOvernightFinancingRateMember
Interest Rate Swap [Member]
Interest Rate Swap Agreement [Abstract]
Notional amount of swap	$ 12,000		$ 12,000
Fixed interest rate	3.16%		3.16%
Percentage of variable interest rate	59.00%		59.00%
Basis spread adjustment	0.11448%		0.11448%
Net payment rate on swap	0.54%	(0.03%)	0.53%	(0.04%)
Interest rate swap settlements reclassified from regulatory assets to interest expense	$ 16	$ (1)	$ 48	$ (3)
Overall interest rate swap loss	1	$ 252	170	$ 15
Interest rate swap settlements to be reclassified during the next 12 months	116		116
Potential payment to counterparty	519		519
Variable Rate Pennsylvania Economic Development Financing Authority Exempt Facilities Revenue Refunding Bonds, Series 2008A, due 2029 [Member]
Interest Rate Swap Agreement [Abstract]
Outstanding borrowings	$ 12,000		$ 12,000		$ 12,000