CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues
Electric	$ 241,342	$ 236,046
Gas	91,197	109,965
Total Revenues	332,539	346,011
Operating Expenses
Cost of sales	115,434	112,391
Operating, general and administrative	79,861	81,123
Property and other taxes	35,421	32,787
Depreciation and depletion	39,890	35,819
Total Operating Expenses	270,606	262,120
Operating Income	61,933	83,891
Interest Expense, net	(24,509)	(23,115)
Other Income	3,102	665
Income Before Income Taxes	40,526	61,441
Income Tax Expense	(2,472)	(10,016)
Net Income	$ 38,054	$ 51,425
Average Common Shares Outstanding	48,242,307	46,976,989
Basic Earnings per Average Common Share	$ 0.79	$ 1.09
Diluted Earnings per Average Common Share	0.79	1.09
Dividends Declared per Common Share	$ 0.50	$ 0.48