Acquisitions (Narrative) (Details) $ in Thousands	1 Months Ended
	Jul. 31, 2023 USD ($) customer	Jun. 30, 2023 USD ($) customer	Apr. 30, 2023 USD ($) customer	Mar. 31, 2023 USD ($) customer	Nov. 30, 2022 USD ($) customer	Aug. 31, 2022 USD ($) customer	Mar. 31, 2022 USD ($) customer	Oct. 31, 2021 USD ($) customer	Jan. 31, 2021 USD ($) customer	Sep. 30, 2019 USD ($) customer item	Jan. 31, 2023 USD ($)	Oct. 31, 2022 USD ($)
Union Rome [Member]
Business Acquisition [Line Items]
Number of customers | customer		4,679
Total purchase price | $		$ 25,547
North Heidelberg Sewer Company [Member]
Business Acquisition [Line Items]
Number of customers | customer				273
Total purchase price | $				$ 136
Water And Wastewater Utility Systems [Member]
Business Acquisition [Line Items]
Number of customers | customer			2,300
Total purchase price | $			$ 18,000
Aqua Pennsylvania, Inc [Member]
Business Acquisition [Line Items]
Debt instrument, issued | $											$ 75,000	$ 125,000
Oak Brook Illinois [Member] | Water And Wastewater Utility Systems [Member]
Business Acquisition [Line Items]
Number of customers | customer					2,037
Total purchase price | $					$ 12,500
Delaware [Member] | Water Utility System [Member]
Business Acquisition [Line Items]
Number of customers | customer										16,000
Total purchase price | $										$ 276,500
Retail customers | customer										198,000
Number of municipalities | item										42
East Whiteland Township [Member] | Water And Wastewater Utility Systems [Member]
Business Acquisition [Line Items]
Number of customers | customer						4,018
Total purchase price | $						$ 54,374
Lower Makefield Township [Member] | Water And Wastewater Utility Systems [Member]
Business Acquisition [Line Items]
Number of customers | customer							11,323
Total purchase price | $							$ 53,000
Beaver Falls Pennsylvania [Member] | Water Utility System [Member]
Business Acquisition [Line Items]
Number of customers | customer								7,600
Total purchase price | $								$ 41,250
Pennsylvania [Member] | Water And Wastewater Utility Systems [Member]
Business Acquisition [Line Items]
Number of customers | customer									2,300
Total purchase price | $									$ 17,500
Subsequent Event [Member] | Shenandoah Borough [Member]
Business Acquisition [Line Items]
Number of customers | customer	2,887
Total purchase price | $	$ 12,291
Subsequent Event [Member] | La Rue [Member]
Business Acquisition [Line Items]
Number of customers | customer	300
Total purchase price | $	$ 2,253
Subsequent Event [Member] | Southern Oaks Water System [Member]
Business Acquisition [Line Items]
Number of customers | customer	765
Total purchase price | $	$ 3,321
Subsequent Event [Member] | Village of Frankfort [Member]
Business Acquisition [Line Items]
Number of customers | customer	1,400
Total purchase price | $	$ 1,424
Water And Wastewater Utility Systems [Member]
Business Acquisition [Line Items]
Number of customers | customer		225
Total purchase price | $		$ 50