Acquisitions (Details) $ in Thousands			12 Months Ended
	Aug. 14, 2023 USD ($) people serviceConnection	Dec. 17, 2021 USD ($) mi² serviceConnection people	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Business Acquisition [Line Items]
Payments for business acquisition			$ 7,537	$ 433	$ 23,587
Seller financing in asset acquisition, net of discount			15,400	0	$ 0
Goodwill			$ 640,311	640,311
KT Water Resource L. P.
Business Acquisition [Line Items]
Asset acquisition, consideration transferred before transaction costs	$ 39,891
Payment for asset acquisition	24,491
Seller financing in asset acquisition, net of discount	15,400
Asset acquisition, transaction cost	170
Asset acquisition, consideration transferred	40,061
Asset acquisition, other intangible asset	28,386
Asset acquisition, nonutility property	11,684
Asset acquisition, other current liabilities	9
Asset acquisition, post-closing production payment	$ 29,000
Asset acquisition, period of post-closing production payment	29 years
KT Water Development Ltd
Business Acquisition [Line Items]
Payments for business acquisition	$ 7,338
Kendall West Utility and Bandera East Utility
Business Acquisition [Line Items]
Payments for business acquisition		$ 23,587
Utility plant, net		9,400
Goodwill		$ 12,300		12,167
Goodwill, measurement period adjustments				$ 161
Texas Water | KT Water Development Ltd
Business Acquisition [Line Items]
Number of people served from acquisition | people	1,725
Texas Water | KT Water Development Ltd | Southern Comal County, Texas
Business Acquisition [Line Items]
Number of service connections from acquisition | serviceConnection	570
CLWSC | Kendall West Utility and Bandera East Utility
Business Acquisition [Line Items]
Number of people served from acquisition | people		5,000
Service area from acquisition | mi²		19
CLWSC | Kendall West Utility and Bandera East Utility | South Central Texas
Business Acquisition [Line Items]
Number of service connections from acquisition | serviceConnection		1,600