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CONSOLIDATED STATEMENTS OF EARNINGS - USD ($)
shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Operating Revenues        
Total Operating Revenues $ 84.5 $ 80.8 $ 230.3 $ 206.8
Operating Expenses        
Operation and Maintenance 17.8 16.5 35.1 32.5
Depreciation and Amortization 12.7 11.9 25.0 24.4
Taxes Other Than Income Taxes 5.2 5.2 11.0 10.7
Total Operating Expenses 73.9 69.2 191.6 167.5
Operating Income 10.6 11.6 38.7 39.3
Interest Expense, net 5.9 5.3 11.9 11.3
Other Expense (Income), net 1.3 1.2 3.0 2.8
Income Before Income Taxes 3.4 5.1 23.8 25.2
Income Tax Expense (Benefit) (0.2) 2.0 4.6 9.7
Net Income $ 3.6 $ 3.1 $ 19.2 $ 15.5
Net Income Per Common Share (Basic and Diluted) $ 0.24 $ 0.23 $ 1.30 $ 1.11
Weighted Average Common Shares Outstanding - (Basic and Diluted) 14.8 14.1 14.8 14.1
Dividends Declared Per Share of Common Stock $ 0.365 $ 0.360 $ 0.730 $ 0.720
Gas        
Operating Revenues        
Total Operating Revenues $ 34.7 $ 32.0 $ 121.7 $ 106.8
Operating Expenses        
Operating Expenses 11.8 11.5 58.9 48.3
Electric        
Operating Revenues        
Total Operating Revenues 48.7 47.4 106.2 96.9
Operating Expenses        
Operating Expenses 26.4 24.1 61.6 51.6
Other        
Operating Revenues        
Total Operating Revenues $ 1.1 $ 1.4 $ 2.4 $ 3.1