CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Operating Revenues	$ 36,196	$ 32,541
Operating Expenses:
Operations and Maintenance	19,139	18,356
Depreciation	5,622	4,832
Other Taxes	4,144	3,719
Total Operating Expenses	28,905	26,907
Gain on Sale of Subsidiary	5,232
Operating Income	12,523	5,634
Other Income:
Allowance for Funds Used During Construction	377	1,263
Other Income, net	1,379	775
Total Other Income, net	1,756	2,038
Interest Charges	1,850	1,738
Income before Income Taxes	12,429	5,934
Income Taxes	329	(973)
Net Income	12,100	6,907
Preferred Stock Dividend Requirements	30	30
Earnings Applicable to Common Stock	$ 12,070	$ 6,877
Earnings per share of Common Stock:
Basic	$ 0.69	$ 0.39
Diluted	$ 0.68	$ 0.39
Average Number of Common Shares Outstanding:
Basic	17,538	17,476
Diluted	17,653	17,591