Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating Revenues
Regulated Energy	$ 109,393	$ 97,654
Unregulated Energy and other	129,963	87,506
Total Operating Revenues	239,356	185,160
Operating Expenses
Regulated Energy cost of sales	48,231	40,244
Unregulated Energy and other cost of sales	99,826	60,754
Operations	32,702	32,490
Maintenance	3,593	3,231
Depreciation and amortization	9,704	8,812
Other taxes	4,894	4,530
Total Operating Expenses	198,950	150,061
Operating Income	40,406	35,099
Other income (expense), net	68	(700)
Interest charges	3,664	2,739
Income Before Income Taxes	36,810	31,660
Income taxes	9,955	12,516
Net Income	$ 26,855	$ 19,144
Weighted Average Common Shares Outstanding:
Basic (shares)	16,351,338	16,317,224
Diluted (shares)	16,402,985	16,363,796
Earnings Per Share of Common Stock:
Basic (in dollars per share)	$ 1.64	$ 1.17
Diluted (in dollars per share)	1.64	1.17
Cash Dividends Declared Per Share of Common Stock (in dollars per share)	$ 0.3250	$ 0.305