Condensed Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Operating Revenues
Regulated energy	$ 61,646	$ 55,216	$ 163,812	$ 136,783
Unregulated energy	34,321	36,025	114,294	91,016
Other	4,530	2,905	8,728	7,075
Total Operating Revenues	100,497	94,146	286,834	234,874
Operating Expenses
Regulated energy cost of sales	24,672	22,115	78,979	63,730
Unregulated energy and other cost of sales	28,442	28,773	89,766	68,861
Operations	24,615	22,822	51,242	44,577
Maintenance	2,457	1,820	4,606	3,542
Depreciation and amortization	6,736	5,977	13,371	11,797
Other taxes	3,118	3,487	6,791	6,665
Total Operating Expenses	90,040	84,994	244,755	199,172
Operating Income	10,457	9,152	42,079	35,702
Other income, net of other expenses	405	24	413	312
Interest charges	2,303	2,016	4,459	4,088
Income Before Income Taxes	8,559	7,160	38,033	31,926
Income taxes	3,425	2,804	15,218	12,701
Net Income	$ 5,134	$ 4,356	$ 22,815	$ 19,225
Weighted Average Common Shares Outstanding:
Basic (in shares)	9,704,161	9,621,580	9,681,422	9,611,610
Diluted (in shares)	9,737,852	9,695,470	9,715,762	9,687,253
Earnings Per Share of Common Stock:
Basic (in usd per share)	$ 0.53	$ 0.45	$ 2.36	$ 2.00
Diluted (in usd per share)	$ 0.53	$ 0.45	$ 2.35	$ 1.99
Cash Dividends Declared Per Share of Common Stock (in usd per share)	$ 0.405	$ 0.385	$ 0.79	$ 0.75