CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating revenues
Total Operating Revenues	$ 98,897	$ 90,859	$ 88,141
Operating expenses
Utility operating expenses	43,772	41,414	40,338
Non-utility operating expenses	6,850	3,942	3,277
Depreciation and amortization	12,620	11,885	11,143
State and federal income taxes expense (benefit)
Current	4,285	3,360	8,073
Deferred	1,593	2,377	(2,389)
Property and other taxes	5,871	5,587	5,404
Total Operating Expenses	74,991	68,565	65,846
Operating income	23,906	22,294	22,295
Other income, net
Allowance for funds used during construction (AFUDC)	1,329	823	1,170
Miscellaneous (expense) income	1,265	1,302	971
Total other income	2,594	2,125	2,141
Income before interest charges	26,500	24,419	24,436
Interest charges	8,502	7,592	7,619
Net income applicable to common stock	$ 17,998	$ 16,827	$ 16,817
Income per common share:
Basic (in dollars per share)	$ 1.9	$ 1.79	$ 1.8
Diluted (in dollars per share)	$ 1.9	$ 1.79	$ 1.79
Weighted average common shares outstanding:
Basic (in shares)	9,462	9,394	9,327
Diluted (in shares)	9,481	9,426	9,369
Cash dividends per share of common stock (in dollars per share)	$ 1.09	$ 1.05	$ 1.01
Water Sales [Member]
Operating revenues
Total Operating Revenues	$ 78,318	$ 77,821	$ 76,476
Other Utility Operating Revenue [Member]
Operating revenues
Total Operating Revenues	11,506	7,195	6,525
Non-Utility Operating Revenue [Member]
Operating revenues
Total Operating Revenues	$ 9,073	$ 5,843	$ 5,140