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CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Income Statement [Abstract]    
Operating Revenues $ 38,156 $ 36,196
Operating Expenses:    
Operations and Maintenance 20,257 19,139
Depreciation 5,986 5,622
Other Taxes 4,423 4,144
Total Operating Expenses 30,666 28,905
Gain on Sale of Subsidiary 5,232
Operating Income 7,490 12,523
Other Income (Expense):    
Allowance for Funds Used During Construction 813 377
Other Income, net 898 1,379
Total Other Income, net 1,711 1,756
Interest Charges 2,595 1,850
Income before Income Taxes 6,606 12,429
Income Taxes 738 329
Net Income 5,868 12,100
Preferred Stock Dividend Requirements 30 30
Earnings Applicable to Common Stock $ 5,838 $ 12,070
Earnings per share of Common Stock:    
Basic (in Dollars per share) $ 0.33 $ 0.69
Diluted (in Dollars per share) $ 0.33 $ 0.68
Average Number of Common Shares Outstanding:    
Basic (in Shares) 17,652 17,538
Diluted (in Shares) 17,767 17,653