CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Operating revenues
Electric	$ 214,426	$ 210,810	$ 575,532	$ 573,870
Natural gas	11,742	13,312	68,064	86,675
Other	307	346	851	881
Total operating revenues	226,475	224,468	644,447	661,426
Operating expenses
Electric fuel and purchased power	111,088	109,877	316,982	315,542
Cost of natural gas sold and transported	5,656	7,472	39,658	56,817
Operating and maintenance expenses	41,726	41,619	122,718	121,516
Conservation program expenses	3,714	3,232	10,836	9,715
Depreciation and amortization	17,338	17,311	51,440	50,956
Taxes (other than income taxes)	6,218	5,925	18,816	17,836
Total operating expenses	185,740	185,436	560,450	572,382
Operating income	40,735	39,032	83,997	89,044
Other (expense) income, net	(85)	133	375	147
Allowance for funds used during construction - equity	(385)	289	1,379	700
Interest charges and financing costs
Interest charges - includes other financing costs of $375, $452, $1,185 and $1,261, respectively	5,944	6,017	18,003	18,102
Allowance for funds used during construction - debt	(995)	(40)	(1,220)	(117)
Total interest charges and financing costs	4,949	5,977	16,783	17,985
Income before income taxes	35,316	33,477	68,968	71,906
Income taxes	13,116	13,504	26,148	28,812
Net income	$ 22,200	$ 19,973	$ 42,820	$ 43,094