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Fair Value of Financial Instruments (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2023
Dec. 31, 2022
Interest Rate Swap [Abstract]    
Term of debt on utilities rated A- used to discount prospective cash flows 30 years  
Reduction in fair value of swap liability $ (84)  
Fair Value Measurements [Abstract]    
Customers' advances for construction 15,871 $ 14,911
Note receivable 255 255
Fair Value on a Recurring Basis [Member]    
Interest Rate Swap [Abstract]    
Interest rate swap 516 680
Fair Value on a Recurring Basis [Member] | Fair Value Measurements at Reporting Date Using Significant Other Observable Inputs (Level 2) [Member]    
Interest Rate Swap [Abstract]    
Interest rate swap 516 680
Carrying Amount [Member]    
Fair Value, Financial Liabilities [Abstract]    
Total long-term debt 160,497 142,110
Estimated Fair Value [Member]    
Fair Value, Financial Liabilities [Abstract]    
Total long-term debt $ 145,000 $ 126,000