CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Operating revenues
Electric	$ 179,105	$ 178,692	$ 361,106	$ 363,060
Natural gas	14,830	19,880	56,322	73,363
Other	238	278	544	535
Total operating revenues	194,173	198,850	417,972	436,958
Operating expenses
Electric fuel and purchased power	103,280	100,183	205,894	205,665
Cost of natural gas sold and transported	7,123	12,081	34,002	49,345
Operating and maintenance expenses	42,492	40,309	80,992	79,897
Conservation program expenses	3,620	3,422	7,122	6,483
Depreciation and amortization	17,093	16,906	34,102	33,645
Taxes (other than income taxes)	6,217	5,834	12,598	11,911
Total operating expenses	179,825	178,735	374,710	386,946
Operating income	14,348	20,115	43,262	50,012
Other (expense) income, net	(40)	(60)	460	14
Allowance for funds used during construction - equity	765	305	1,764	411
Interest charges and financing costs
Interest charges - includes other financing costs of $384, $445, $810 and $809, respectively	6,044	6,082	12,059	12,085
Allowance for funds used during construction - debt	(139)	(39)	(225)	(77)
Total interest charges and financing costs	5,905	6,043	11,834	12,008
Income before income taxes	9,168	14,317	33,652	38,429
Income taxes	3,426	5,839	13,032	15,308
Net income	$ 5,742	$ 8,478	$ 20,620	$ 23,121