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Acquisitions (Narrative) (Details) $ in Thousands		1 Months Ended											12 Months Ended
	Aug. 12, 2022 USD ($) customer	Oct. 31, 2024 USD ($) customer	Aug. 31, 2024 USD ($) customer	Jun. 30, 2024 USD ($) customer	May 31, 2024 USD ($) customer	Dec. 31, 2023 USD ($) customer	Sep. 30, 2023 USD ($) customer	Jul. 31, 2023 USD ($) customer	Jun. 30, 2023 USD ($) customer	Apr. 30, 2023 USD ($) customer	Mar. 31, 2023 USD ($) customer	Oct. 31, 2021 USD ($) customer	Dec. 31, 2019 USD ($) item customer
Village of Midvale, Ohio’s water system [Member]
Business Acquisition [Line Items]
Number of customers | customer			900
Cash paid for business acquisition | $			$ 2,950
Shenandoah Borough [Member]
Business Acquisition [Line Items]
Number of customers | customer								2,900
Cash paid for business acquisition | $								$ 12,291
La Rue [Member]
Business Acquisition [Line Items]
Number of customers | customer								300
Cash paid for business acquisition | $								$ 2,253
Southern Oaks Water System [Member]
Business Acquisition [Line Items]
Number of customers | customer								800
Cash paid for business acquisition | $								$ 3,321
Village of Frankfort [Member]
Business Acquisition [Line Items]
Number of customers | customer								1,500
Cash paid for business acquisition | $								$ 1,424
Union Rome [Member]
Business Acquisition [Line Items]
Number of customers | customer									4,300
Cash paid for business acquisition | $									$ 25,547
North Heidelberg Sewer Company [Member]
Business Acquisition [Line Items]
Number of customers | customer											300
Cash paid for business acquisition | $											$ 136
Delaware [Member] | Wastewater Utility System [Member]
Business Acquisition [Line Items]
Number of customers | customer													16,000
Cash paid for business acquisition | $													$ 276,500
Retail customers | customer													198,000
Number of municipalities | item													42
Texas [Member] | Integra Water Texas, LLC [Member]
Business Acquisition [Line Items]
Number of customers | customer		1,100
Cash paid for business acquisition | $		$ 4,400
East Whiteland Township [Member] | Water And Wastewater Utility Systems [Member]
Business Acquisition [Line Items]
Number of customers | customer	4,018
Cash paid for business acquisition | $	$ 54,374
Glenview, Illinois [Member] | Wastewater Utility Assets Of Westfield HOA [Member]
Business Acquisition [Line Items]
Number of customers | customer					200
Cash paid for business acquisition | $					$ 67
Greenville, Pennsylvania [Member] | Water And Wastewater Utility Systems [Member]
Business Acquisition [Line Items]
Number of customers | customer							3,000			2,300
Cash paid for business acquisition | $							$ 18,000			$ 18,000
Beaver Falls Pennsylvania [Member] | Water And Wastewater Utility Systems [Member]
Business Acquisition [Line Items]
Number of customers | customer												7,600
Cash paid for business acquisition | $												$ 41,250
Harris County, Texas [Member] | Private Water And Wastewater Utility Assets [Member]
Business Acquisition [Line Items]
Number of customers | customer				400
Cash paid for business acquisition | $				$ 1,125
North Versailles Pennsylvania [Member] | Water And Wastewater Utility Systems [Member]
Business Acquisition [Line Items]
Number of customers | customer						4,400
North Versailles Pennsylvania [Member] | Water And Wastewater Utility Systems [Member] | Minimum [Member]
Business Acquisition [Line Items]
Cash paid for business acquisition | $						$ 25,000
North Versailles Pennsylvania [Member] | Water And Wastewater Utility Systems [Member] | Maximum [Member]
Business Acquisition [Line Items]
Cash paid for business acquisition | $						$ 30,000
Indiana [Member] | Wastewater Utility Assets in Morgan County [Member]
Business Acquisition [Line Items]
Number of customers | customer		100
Cash paid for business acquisition | $		$ 500

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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