v3.26.1
Rates and Regulatory Matters (Details)
$ in Thousands
1 Months Ended 6 Months Ended 12 Months Ended
Jan. 01, 2026
USD ($)
Jan. 01, 2025
USD ($)
Jun. 30, 2026
USD ($)
Feb. 28, 2026
USD ($)
Jan. 31, 2026
USD ($)
customer
entity
Dec. 31, 2025
USD ($)
Nov. 30, 2025
USD ($)
Jul. 31, 2025
USD ($)
Jun. 30, 2026
USD ($)
unit
Dec. 31, 2025
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
MDL Lawsuit                        
Rate and Regulatory Matters (Details) [Line Items]                        
Settlement payments received                 $ 8,100      
DSIC                        
Rate and Regulatory Matters (Details) [Line Items]                        
Approved increase amount in revenues                       $ 2,300
Tidewater | Pinewood Acres Water Utility Assets                        
Rate and Regulatory Matters (Details) [Line Items]                        
Acquisition of assets         $ 200              
Number of customers served | customer         350              
MDL Lawsuit                        
Rate and Regulatory Matters (Details) [Line Items]                        
Settlement payments received                 $ 5,800      
NJBPU                        
Rate and Regulatory Matters (Details) [Line Items]                        
Approved increase amount in revenues       $ 14,500                
Return on equity       9.60%                
Common equity ratio       54.25%                
NJBPU | DSIC                        
Rate and Regulatory Matters (Details) [Line Items]                        
Approved increase amount in revenues             $ 900          
NJBPU | LSLR                        
Rate and Regulatory Matters (Details) [Line Items]                        
Approved recovery of costs                   $ 300 $ 400  
NJBPU | Middlesex And Pinelands Customers                        
Rate and Regulatory Matters (Details) [Line Items]                        
Refund credited amount       $ 3,300                
NJBPU | Middlesex and Pinelands                        
Rate and Regulatory Matters (Details) [Line Items]                        
Number of entities approved for corporate reorganization | entity         3              
NJBPU | Middlesex and Pinelands | RESIC                        
Rate and Regulatory Matters (Details) [Line Items]                        
Period for approved recovery of costs       3 years                
Period for surcharge filings       6 months                
Maximum value of costs to be recovered       $ 3,600                
Maximum percentage of costs to be recovered       2.50%                
NJBPU | Middlesex and Pinelands | DSIC                        
Rate and Regulatory Matters (Details) [Line Items]                        
Period for approved recovery of costs       3 years                
Period for surcharge filings       6 months                
Maximum value of costs to be recovered       $ 7,100                
Maximum percentage of costs to be recovered       5.00%                
DEPSC | Tidewater                        
Rate and Regulatory Matters (Details) [Line Items]                        
Approved increase amount in revenues               $ 5,500        
Return on equity               9.50%        
Common equity ratio               53.50%        
DEPSC | Tidewater | DSIC                        
Rate and Regulatory Matters (Details) [Line Items]                        
Approved increase amount in revenues     $ 600     $ 300            
DEPSC | Tidewater Customers                        
Rate and Regulatory Matters (Details) [Line Items]                        
Refund credited amount       $ 1,100                
DEPSC | Southern Shores                        
Rate and Regulatory Matters (Details) [Line Items]                        
Approved increase amount in revenues $ 100 $ 100                    
Number of unit condominium community entity provides water service to | unit                 2,200      
Approved increase percentage in rates 4.89% 6.51%                    
DEPSC | Southern Shores | Minimum                        
Rate and Regulatory Matters (Details) [Line Items]                        
Approved increase percentage in rates                 3.00%