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Commitments and Contingent Liabilities (Details) - USD ($)
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Commitments and Contingent Liabilities (Details) [Line Items]    
Estimated incremental borrowing rate 4.03%  
Rental expenses under operating leases $ 200,000 $ 200,000
Construction program expenses 111,000,000  
Estimated obligation expenditure $ 20,500,000  
Purchase Commitment [Member]    
Commitments and Contingent Liabilities (Details) [Line Items]    
Purchase commitment expiration date of contract Nov. 30, 2023  
Average purchase $ 27,000,000  
Regulated Water Utility [Member]    
Commitments and Contingent Liabilities (Details) [Line Items]    
Purchase commitment expiration date of contract Feb. 27, 2026  
Average purchase $ 3,000,000  
City of Dover [Member]    
Commitments and Contingent Liabilities (Details) [Line Items]    
Average purchase $ 15,000,000