CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Operating revenues
Electric	$ 224,666	$ 216,289	$ 634,571	$ 625,663
Natural gas	11,088	14,484	91,273	117,814
Other	407	273	1,090	825
Total operating revenues	236,161	231,046	726,934	744,302
Operating expenses
Electric fuel and purchased power, non-affiliates	2,624	2,707	5,066	11,887
Purchased power, affiliates	102,297	105,092	318,542	321,550
Cost of natural gas sold and transported	4,375	7,854	54,933	78,190
Operating and maintenance expenses	46,292	47,899	134,126	140,563
Conservation program expenses	2,977	3,005	8,821	8,692
Depreciation and amortization	23,019	19,940	66,908	59,121
Taxes (other than income taxes)	7,045	7,009	21,151	20,458
Loss on Monticello life cycle management/extended power uprate project	0	0	5,237	0
Total operating expenses	188,629	193,506	614,784	640,461
Operating income	47,532	37,540	112,150	103,841
Other income (expense), net	100	(9)	384	45
Allowance for funds used during construction — equity	1,929	1,576	5,926	4,915
Interest charges and financing costs
Interest charges — includes other financing costs of $461, $408, $1,273 and $1,159, respectively	8,625	7,701	24,152	21,536
Allowance for funds used during construction — debt	(931)	(733)	(2,865)	(2,341)
Total interest charges and financing costs	7,694	6,968	21,287	19,195
Income before income taxes	41,867	32,139	97,173	89,606
Income taxes	15,635	12,109	36,162	33,319
Net income	$ 26,232	$ 20,030	$ 61,011	$ 56,287