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Statements of Income - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Statements of Income [Abstract]    
OPERATING REVENUES: $ 71,031 $ 60,061
OPERATING EXPENSES:    
Operation and maintenance 17,362 14,133
Administrative and general 10,893 9,926
Depreciation and amortization 11,746 10,139
Taxes other than income taxes 1,499 1,380
Operating expenses 41,500 35,578
Operating income 29,531 24,483
OTHER INCOME (EXPENSES):    
Interest on debt (7,047) (5,114)
Allowance for funds used during construction 4,153 1,501
Other pension costs (1,082) (1,275)
Other income (expenses), net (521) 0
Other income (expenses) (4,497) (4,888)
Income before income taxes 25,034 19,595
Income tax expense 1,277 15
Net Income $ 23,757 $ 19,580
Basic Earnings Per Share (in dollars per share) $ 1.66 $ 1.4
Diluted Earnings Per Share (in dollars per share) $ 1.66 $ 1.4