CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Operating revenues
Electric	$ 232,216	$ 224,666	$ 646,619	$ 634,571
Natural gas	13,646	11,088	72,671	91,273
Other	282	407	877	1,090
Total operating revenues	246,144	236,161	720,167	726,934
Operating expenses
Electric fuel and purchased power, non-affiliates	4,238	2,624	11,870	5,066
Purchased power, affiliates	105,734	102,297	311,301	318,542
Cost of natural gas sold and transported	6,081	4,375	35,964	54,933
Operating and maintenance expenses	49,235	46,292	148,370	134,126
Conservation program expenses	3,308	2,977	9,468	8,821
Depreciation and amortization	24,700	23,019	72,869	66,908
Taxes (other than income taxes)	6,506	7,045	20,757	21,151
Loss on Monticello life cycle management/extended power uprate project	0	0	0	5,237
Total operating expenses	199,802	188,629	610,599	614,784
Operating income	46,342	47,532	109,568	112,150
Other (expense) income, net	(102)	100	424	384
Allowance for funds used during construction — equity	1,241	1,929	2,969	5,926
Interest charges and financing costs
Interest charges — includes other financing costs of $465, $461, $1,388 and $1,273, respectively	8,613	8,625	25,800	24,152
Allowance for funds used during construction — debt	(525)	(931)	(1,264)	(2,865)
Total interest charges and financing costs	8,088	7,694	24,536	21,287
Income before income taxes	39,393	41,867	88,425	97,173
Income taxes	15,172	15,635	33,948	36,162
Net income	$ 24,221	$ 26,232	$ 54,477	$ 61,011