The cash outflow for the purchase of waste water systems which includes the waste treatment and disposal facility and equipment to households and industry.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585

Name:	us-gaap_PaymentsToAcquireWasteWaterSystems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Acquisitions (Details) $ in Thousands		9 Months Ended
Acquisitions (Details) $ in Thousands	Aug. 29, 2019 USD ($) Customer	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)
Acquisitions [Abstract]
Purchase price		$ 2,088	$ 0
Wastewater Collection Assets of Jacobus Borough Sewer Authority [Member]
Acquisitions [Abstract]
Number of customers acquired \| Customer	700
Purchase price	$ 2,088