Condensed Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating Revenues
Regulated energy	$ 81,566	$ 72,296
Unregulated energy	54,991	44,887
Other	4,172	3,731
Total operating revenues	140,729	120,914
Operating Expenses
Regulated energy cost of sales	41,615	35,672
Unregulated energy and other cost of sales	40,090	34,593
Operations	21,754	19,955
Maintenance	1,722	1,976
Depreciation and amortization	5,820	5,761
Other taxes	3,178	2,884
Total operating expenses	114,179	100,841
Operating Income	26,550	20,073
Other income, net of other expenses	289	196
Interest charges	2,072	2,291
Income Before Income Taxes	24,767	17,978
Income taxes	9,898	7,251
Net Income	$ 14,869	$ 10,727
Weighted Average Common Shares Outstanding:
Basic	9,601,529	9,571,270
Diluted	9,678,950	9,666,885
Earnings Per Share of Common Stock:
Basic	$ 1.55	$ 1.12
Diluted	$ 1.54	$ 1.11
Cash Dividends Declared Per Share of Common Stock	$ 0.365	$ 0.345