CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Operating revenues
Electric	$ 210,810	$ 198,617	$ 573,870	$ 535,761
Natural gas	13,312	12,186	86,675	78,948
Other	346	265	881	725
Total operating revenues	224,468	211,068	661,426	615,434
Operating expenses
Electric fuel and purchased power	109,877	105,624	315,542	302,509
Cost of natural gas sold and transported	7,472	6,494	56,817	51,195
Other operating and maintenance expenses	41,619	40,589	121,516	116,409
Conservation program expenses	3,232	3,728	9,715	9,613
Depreciation and amortization	17,311	15,767	50,956	47,380
Taxes (other than income taxes)	5,925	5,735	17,836	17,336
Total operating expenses	185,436	177,937	572,382	544,442
Operating income	39,032	33,131	89,044	70,992
Other income, net	133	204	147	953
Allowance for funds used during construction - equity	289	639	700	1,722
Interest charges and financing costs
Interest charges - includes other financing costs of $452, $358, $1,261 and $1,062, respectively	6,017	6,005	18,102	18,404
Allowance for funds used during construction - debt	(40)	(306)	(117)	(789)
Total interest charges and financing costs	5,977	5,699	17,985	17,615
Income before income taxes	33,477	28,275	71,906	56,052
Income taxes	13,504	10,651	28,812	22,205
Net income	$ 19,973	$ 17,624	$ 43,094	$ 33,847