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Acquisitions (Details)
$ in Thousands
9 Months Ended
Aug. 14, 2023
USD ($)
serviceConnection
people
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Business Acquisition [Line Items]      
Payments for business acquisition   $ 7,286 $ 433
Seller financing in asset acquisition, net of discount   $ 15,400 $ 0
KT Water Resources      
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      
Business Acquisition [Line Items]      
Payments for business acquisition $ 7,338    
TWC | KT Water Development      
Business Acquisition [Line Items]      
Number of people served from acquisition | people 1,725    
TWC | Southern Comal County, Texas | KT Water Development      
Business Acquisition [Line Items]      
Number of service connections from acquisition | serviceConnection 570