v3.26.1
Plan Of Merger With American Water (Narrative) (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Oct. 26, 2025
$ / shares
Jun. 30, 2026
USD ($)
$ / shares
Jun. 30, 2026
USD ($)
$ / shares
Dec. 31, 2025
$ / shares
Business Acquisition [Line Items]        
Common stock, par value $ 0.50 $ 0.50 $ 0.50 $ 0.50
Merger related costs | $   $ 1,191 $ 17,521  
American Water Works Company, Inc. [Member]        
Business Acquisition [Line Items]        
Common stock, par value $ 0.01      
Business combination consideration transferred exchange ratio 0.305