Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Statements of Income [Abstract]
OPERATING REVENUES:	$ 77,488	$ 74,959
OPERATING EXPENSES:
Operation and maintenance	20,812	19,670
Administrative and general	12,875	12,610
Depreciation and amortization	14,241	12,962
Taxes other than income taxes	1,855	1,676
Operating expenses	49,783	46,918
Operating income	27,705	28,041
OTHER INCOME (EXPENSES):
Interest on debt	(10,262)	(8,904)
Allowance for funds used during construction	820	2,052
Other pension costs	530	524
Gain on life insurance	831	0
Other income (expenses), net	(382)	(38)
Other income (expenses)	(8,463)	(6,366)
Income before income taxes	19,242	21,675
Income tax expense (benefit)	(816)	1,350
Net Income	$ 20,058	$ 20,325
Basic Earnings Per Share (in dollars per share)	$ 1.39	$ 1.42
Diluted Earnings Per Share (in dollars per share)	$ 1.39	$ 1.42