CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Operating Revenues	$ 39,683	$ 36,701	$ 75,879	$ 69,242
Operating Expenses:
Operations and Maintenance	19,557	17,959	38,695	36,315
Depreciation	5,670	5,187	11,292	10,019
Other Taxes	4,368	3,741	8,512	7,460
Total Operating Expenses	29,595	26,887	58,499	53,794
Gain on Sale of Subsidiary			5,232
Operating Income	10,088	9,814	22,612	15,448
Other Income (Expense):
Allowance for Funds Used During Construction	548	768	926	2,031
Other Income (Expense), net	1,396	790	2,773	1,564
Total Other Income, net	1,944	1,558	3,699	3,595
Interest Charges	2,369	2,070	4,219	3,808
Income before Income Taxes	9,663	9,302	22,092	15,235
Income Taxes	795	(1,621)	1,124	(2,593)
Net Income	8,868	10,923	20,968	17,828
Preferred Stock Dividend Requirements	30	30	60	60
Earnings Applicable to Common Stock	$ 8,838	$ 10,893	$ 20,908	$ 17,768
Earnings per share of Common Stock:
Basic	$ 0.50	$ 0.62	$ 1.19	$ 1.02
Diluted	$ 0.50	$ 0.62	$ 1.18	$ 1.01
Average Number of Common Shares Outstanding:
Basic	17,583	17,488	17,560	17,482
Diluted	17,698	17,603	17,675	17,597