Consolidated Statements of Earnings (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Operating Revenues
Gas	$ 100.3	$ 92.6
Electric	70.3	61.9
Other	1.6	1.6
Total Operating Revenues	172.2	156.1
Operating Expenses
Cost of Gas Sales	61.5	56.1
Cost of Electric Sales	49.1	42.7
Operation and Maintenance	16.9	17.1
Depreciation and Amortization	11.4	10.2
Taxes Other than Income Taxes	4.9	4.6
Total Operating Expenses	143.8	130.7
Operating Income	28.4	25.4
Interest Expense, net	5.8	5.2
Other Expense, net	0.1	0.1
Income Before Income Taxes	22.5	20.1
Income Taxes	8.9	7.5
Net Income	$ 13.6	$ 12.6
Net Income Per Common Share (Basic and Diluted)	$ 0.98	$ 0.91
Weighted Average Common Shares Outstanding - (Basic and Diluted)	13.9	13.8
Dividends Declared Per Share of Common Stock	$ 0.350	$ 0.345