Capital Commitments (Details) - Commitment for Additional Raw Water Pumping Station and Force Main [Member] $ in Thousands	Jun. 30, 2016 USD ($)
Capital Commitments [Abstract]
Total capital commitments	$ 9,799
Remaining capital commitments to be incurred	$ 9,799

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