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CONSOLIDATED STATEMENTS OF EARNINGS - USD ($)
shares in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Operating Revenues:      
Total Operating Revenues $ 563.2 $ 473.3 $ 418.6
Operating Expenses:      
Operation and Maintenance 73.7 68.7 65.7
Depreciation and Amortization 62.6 59.5 54.5
Taxes Other Than Income Taxes 25.9 24.5 23.9
Total Operating Expenses 482.7 395.5 347.2
Operating Income 80.5 77.8 71.4
Interest Expense, Net 25.5 25.6 23.8
Other Expense (Income), Net 2.4 4.6 5.2
Income Before Income Taxes 52.6 47.6 42.4
Provision for Income Taxes 11.2 11.5 10.2
Net Income Applicable to Common Shares $ 41.4 $ 36.1 $ 32.2
Earnings per Common Share - Basic $ 2.59 $ 2.35 $ 2.15
Earnings per Common Share - Diluted $ 2.59 $ 2.35 $ 2.15
Weighted Average Common Shares Outstanding - Basic 15,991 15,373 14,951
Weighted Average Common Shares Outstanding - Diluted 15,996 15,376 14,952
Electric      
Operating Revenues:      
Total Operating Revenues $ 297.9 $ 248.5 $ 227.2
Operating Expenses:      
Cost of Sales 199.1 151.1 134.3
Gas      
Operating Revenues:      
Total Operating Revenues 265.3 224.8 191.4
Operating Expenses:      
Cost of Sales $ 121.4 $ 91.7 $ 68.8