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CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Income Statement [Abstract]        
Operating Revenues $ 47,732 $ 39,874 $ 123,611 $ 109,117
Operating Expenses:        
Operations and Maintenance 20,312 18,950 59,007 55,265
Depreciation 5,814 5,504 17,107 15,523
Other Taxes 5,031 3,996 13,543 11,456
Total Operating Expenses 31,157 28,450 89,657 82,244
Gain on Sale of Subsidiary 5,232
Operating Income 16,575 11,424 39,186 26,873
Other Income (Expense):        
Allowance for Funds Used During Construction 627 344 1,553 2,376
Other Income (Expense), net 1,412 744 4,185 2,308
Total Other Income, net 2,039 1,088 5,738 4,684
Interest Charges 2,355 2,101 6,574 5,910
Income before Income Taxes 16,259 10,411 38,350 25,647
Income Taxes 1,968 (1,065) 3,092 (3,658)
Net Income 14,291 11,476 35,258 29,305
Preferred Stock Dividend Requirements 30 30 90 90
Earnings Applicable to Common Stock $ 14,261 $ 11,446 $ 35,168 $ 29,215
Earnings per share of Common Stock:        
Basic $ 0.81 $ 0.65 $ 2 $ 1.67
Diluted $ 0.8 $ 0.65 $ 1.99 $ 1.66
Average Number of Common Shares Outstanding:        
Basic 17,628 17,491 17,583 17,485
Diluted 17,743 17,606 17,698 17,600