CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Operating revenues
Electric	$ 202,879	$ 199,621	$ 414,403	$ 409,905
Natural gas	16,005	16,889	59,025	80,185
Other	289	303	595	683
Total operating revenues	219,173	216,813	474,023	490,773
Operating expenses
Electric fuel and purchased power, non-affiliates	3,651	1,159	7,632	2,442
Purchased power, affiliates	96,853	104,413	205,567	216,245
Cost of natural gas sold and transported	6,465	8,120	29,883	50,558
Operating and maintenance expenses	50,516	45,661	99,135	87,834
Conservation program expenses	3,094	2,989	6,160	5,844
Depreciation and amortization	23,720	22,528	48,169	43,889
Taxes (other than income taxes)	7,096	6,874	14,251	14,106
Loss on Monticello life cycle management/extended power uprate project	0	0	0	5,237
Total operating expenses	191,395	191,744	410,797	426,155
Operating income	27,778	25,069	63,226	64,618
Other income, net	77	35	526	284
Allowance for funds used during construction — equity	918	1,778	1,728	3,997
Interest charges and financing costs
Interest charges — includes other financing costs of $461, $410, $923 and $812, respectively	8,583	7,771	17,187	15,527
Allowance for funds used during construction — debt	(392)	(864)	(739)	(1,934)
Total interest charges and financing costs	8,191	6,907	16,448	13,593
Income before income taxes	20,582	19,975	49,032	55,306
Income taxes	7,957	7,463	18,776	20,527
Net income	$ 12,625	$ 12,512	$ 30,256	$ 34,779