Rate Activity (Narrative) (Details) - USD ($) $ in Thousands	Oct. 09, 2024	Sep. 12, 2024	Mar. 23, 2024	Jan. 02, 2024	Dec. 13, 2023	Sep. 28, 2023	Jun. 05, 2023	Sep. 30, 2024	Feb. 28, 2023
Pennsylvania and Illinois [Member] | Wastewater [Member]
Water And Wastewater Rates [Line Items]
Distribution system improvement charges reset level upon new base rates								$ 28,733
North Carolina [Member]
Water And Wastewater Rates [Line Items]
No refunds of revenue previously billed and collected									$ 0
Illinois [Member]
Water And Wastewater Rates [Line Items]
Base rate increase (decrease)				$ 19,196
Public Utilities, Approved Rate Increase (Decrease), Percentage				18.90%
New Jersey [Member]
Water And Wastewater Rates [Line Items]
Customer surcharge period	3 years
Service line replacement costs	$ 11,535
Base rate increase (decrease)	$ 2,250
Texas [Member]
Water And Wastewater Rates [Line Items]
Infrastructure rehabilitation surcharges designed to increase total operating revenues on an annual basis						$ 8,388
Virginia [Member] | Regulated Water And Wastewater [Member]
Water And Wastewater Rates [Line Items]
Base rate increase (decrease)		$ 5,490
Base rate increase designed to increase total operating revenues on an annual basis		23.80%
Pennsylvania [Member]
Water And Wastewater Rates [Line Items]
Base rate increase (decrease)			$ 126,675
Public Utilities, Approved Rate Increase (Decrease), Percentage			18.90%
Pennsylvania [Member] | Regulated Natural Gas [Member]
Water And Wastewater Rates [Line Items]
Change in other operating revenue, annually		$ 3,000
Distribution system improvement charges		21,000
Base rate increase (decrease)		$ 111,000
Base rate increase designed to increase total operating revenues on an annual basis		11.10%
Distribution system improvement charges reset level upon new base rates		$ 93,000
Ohio [Member]
Water And Wastewater Rates [Line Items]
Base rate increase (decrease)					$ 4,850
Ohio [Member] | Regulated Water [Member]
Water And Wastewater Rates [Line Items]
Distribution system improvement charges reset level upon new base rates								2,127
Kentucky [Member] | Regulated Natural Gas [Member]
Water And Wastewater Rates [Line Items]
Distribution system improvement charges reset level upon new base rates								$ 1,170
Year 1 [Member] | North Carolina [Member]
Water And Wastewater Rates [Line Items]
Base rate increase (decrease)							$ 14,001
Year 2 [Member] | North Carolina [Member]
Water And Wastewater Rates [Line Items]
Base rate increase (decrease)							3,743
Year 3 [Member] | North Carolina [Member]
Water And Wastewater Rates [Line Items]
Base rate increase (decrease)							$ 4,130