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Rate and Regulatory Matters (Details) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended
Jul. 31, 2025
Jun. 30, 2025
Apr. 30, 2025
Feb. 28, 2025
Jan. 31, 2025
Sep. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2025
Jun. 30, 2025
Dec. 31, 2024
Jun. 30, 2024
Rate and Regulatory Matters [Line Items]                        
Approved increase in annual operating revenues   $ 1,100 $ 1,100 $ 500 $ 100              
Cost incurred                       $ 300
Annual operating revenues                   $ 5,500    
Return on equity                   9.50%    
Refund of excess deferred income taxes                   $ 1,100    
Additional cost of purchased water             $ 2,004 $ 1,853   $ 3,882   $ 3,612
Consumer price index                   3.00%    
Increase in annual operating revenues         6.51%              
Forecast [Member]                        
Rate and Regulatory Matters [Line Items]                        
Interest income                 $ 600      
Tidewater [Member]                        
Rate and Regulatory Matters [Line Items]                        
Regulatory assets   1,800         $ 1,800     $ 1,800    
New Jersey Board of Public Utilities (NJBPU) [Member]                        
Rate and Regulatory Matters [Line Items]                        
Revenues   $ 24,900                    
Annual base revenues percentage   19.30%         19.30%     19.30%    
Recovering costs   $ 7,600                    
Distribution system improvement charge rate   5.00%                    
Lead Service Line Replacement [Member]                        
Rate and Regulatory Matters [Line Items]                        
Recovering costs                     $ 600  
Delaware Public Service Commission [Member]                        
Rate and Regulatory Matters [Line Items]                        
Additional cost of purchased water           $ 2,100            
Subsequent Event [Member] | New Jersey Board of Public Utilities (NJBPU) [Member]                        
Rate and Regulatory Matters [Line Items]                        
Recovering costs $ 3,800                      
Distribution system improvement charge rate 2.50%                      
Tidewater [Member]                        
Rate and Regulatory Matters [Line Items]                        
Percentage of common equity   53.50%         53.50%     53.50%