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CONSOLIDATED STATEMENTS OF EARNINGS - USD ($)
shares in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Operating Revenues        
Gas $ 22.1 $ 21.7 $ 124.1 $ 149.6
Electric 55.2 51.4 150.4 170.1
Other 1.5 1.6 4.6 4.7
Total Operating Revenues 78.8 74.7 279.1 324.4
Operating Expenses        
Cost of Gas Sales 6.1 5.5 52.4 76.5
Cost of Electric Sales 29.6 29.2 84.3 106.2
Operation and Maintenance 15.5 16.8 48.6 50.0
Depreciation and Amortization 11.6 11.4 35.1 34.1
Taxes Other Than Income Taxes 4.9 4.5 14.7 13.0
Total Operating Expenses 67.7 67.4 235.1 279.8
Operating Income 11.1 7.3 44.0 44.6
Interest Expense, net 5.5 5.5 16.7 17.3
Other Expense, net 0.1   0.2 0.2
Income Before Income Taxes 5.5 1.8 27.1 27.1
Income Tax Expense 2.0 0.1 10.2 10.1
Net Income $ 3.5 $ 1.7 $ 16.9 $ 17.0
Net Income Per Common Share (Basic and Diluted) $ 0.25 $ 0.12 $ 1.21 $ 1.22
Weighted Average Common Shares Outstanding - (Basic and Diluted) 14.0 13.9 14.0 13.9
Dividends Declared Per Share of Common Stock $ 0.355 $ 0.350 $ 1.065 $ 1.050