Developers, builders, governmental agencies and municipalities will provide the entity with cash, or in some cases property, to extend its services to their properties. Nonrefundable contributions are recorded as contributions in aid of construction ("CIAC").

No definition available.

Commitments And Contingencies (Narrative) (Details) $ in Thousands				1 Months Ended		3 Months Ended	6 Months Ended	12 Months Ended
	Jul. 30, 2026 USD ($)	Oct. 25, 2025 USD ($)	Sep. 03, 2019 item	Jun. 30, 2026 USD ($)	Feb. 28, 2025 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2026 USD ($)	Dec. 31, 2025 USD ($)	Jul. 06, 2026 USD ($)
Commitments And Contingencies [Line Items]
Aggregate amount accrued for loss contingencies				$ 20,161		$ 20,161	$ 20,161
Amount probable of recovery through insurance				5,393		5,393	5,393
Insurance reserve for employee medical benefit program				4,934		4,934	4,934
Number of individuals commenced action against company \| item			2
Insurance proceeds					$ 5,602			$ 46,166
Transaction fee and additional fees						1,191	17,521
Loss contingency, receivable, current				4,625		4,625	4,625
Loss contingency, receivable, noncurrent				768		768	768
Legal fees and settlement costs						10,234	10,486
Contributions in aid of construction				729,117		729,117	729,117	726,206
Other Liabilities [Member]
Commitments And Contingencies [Line Items]
Aggregate amount accrued for loss contingencies				4,222		4,222	4,222
Other Accrued Liabilities [Member]
Commitments And Contingencies [Line Items]
Aggregate amount accrued for loss contingencies				15,939		15,939	15,939
Insurance Claims [Member]
Commitments And Contingencies [Line Items]
Aggregate amount accrued for loss contingencies				12,500		12,500	12,500
Amount probable of recovery through insurance				9,250		9,250	9,250
First payment made to class action settlement				6,250
Reduction of insurance expense						6,750
Increase in the litigation reserve related to the executed class action settlement						2,500
Insurance proceeds				$ 4,625
American Water [Member]
Commitments And Contingencies [Line Items]
Advisory fee to be paid		$ 60,000
Advisor termination fee percentage of compensation payable to company if merger fails		10.00%
Transaction fee and additional fees						$ 0	13,000	$ 12,000
Subsequent Event [Member]
Commitments And Contingencies [Line Items]
Insurance proceeds	$ 10,542
Contributions in aid of construction									$ 8,385
Other Water And Wastewater Subsidiaries [Member]
Commitments And Contingencies [Line Items]
Insurance proceeds							44,581
Virginia Water And Wastewater Subsidiaries [Member] \| North Carolina [Member]
Commitments And Contingencies [Line Items]
Insurance proceeds							$ 12,259