CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Operating revenues
Electric	$ 199,621	$ 198,277	$ 409,905	$ 409,374
Natural gas	16,889	29,539	80,185	103,330
Other	303	298	683	552
Total operating revenues	216,813	228,114	490,773	513,256
Operating expenses
Electric fuel and purchased power, non-affiliates	1,159	2,684	2,442	9,180
Purchased power, affiliates	104,413	104,532	216,245	216,458
Cost of natural gas sold and transported	8,120	19,194	50,558	70,336
Operating and maintenance expenses	45,661	48,433	87,834	92,664
Conservation program expenses	2,989	3,015	5,844	5,687
Depreciation and amortization	22,528	19,874	43,889	39,181
Taxes (other than income taxes)	6,874	6,652	14,106	13,449
Loss on Monticello life cycle management/extended power uprate project	0	0	5,237	0
Total operating expenses	191,744	204,384	426,155	446,955
Operating income	25,069	23,730	64,618	66,301
Other income, net	35	(70)	284	54
Allowance for funds used during construction — equity	1,778	1,767	3,997	3,339
Interest charges and financing costs
Interest charges — includes other financing costs of $410, $377, $812 and $751, respectively	7,771	6,968	15,527	13,835
Allowance for funds used during construction — debt	(864)	(850)	(1,934)	(1,608)
Total interest charges and financing costs	6,907	6,118	13,593	12,227
Income before income taxes	19,975	19,309	55,306	57,467
Income taxes	7,463	7,287	20,527	21,210
Net income	$ 12,512	$ 12,022	$ 34,779	$ 36,257