Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Operating Revenues
Member electric sales	$ 326,251	$ 334,009	$ 873,537	$ 858,840
Non-member electric sales	35,478	30,394	92,266	95,242
Other	23,062	23,699	64,684	68,324
Total revenues	384,791	388,102	1,030,487	1,022,406
Operating expenses
Purchased power	105,751	91,001	254,956	235,422
Fuel	67,839	65,586	180,389	162,430
Production	51,699	55,485	159,697	179,382
Transmission	41,383	39,851	116,975	114,922
General and administrative	6,463	5,421	17,965	17,044
Depreciation, amortization, and depletion	45,314	38,371	126,090	109,317
Coal mining	10,174	7,096	25,845	23,039
Other	3,969	3,879	12,989	11,504
Operating expenses	332,592	306,690	894,906	853,060
Operating margins	52,199	81,412	135,581	169,346
Other income
Interest Income	1,094	1,071	3,227	3,241
Capital credits from cooperatives	1,105	754	5,800	5,995
Other income	864	808	2,599	2,659
Total other income	3,063	2,633	11,626	11,895
Interest expense, net of amounts capitalized	37,041	35,846	108,385	106,919
Income taxes	350	0	700	0
Net margins including noncontrolling interest	17,871	48,199	38,122	74,322
Net (income) loss attributable to noncontrolling interest	(132)	103	(313)	390
Net margins attributable to the Association	$ 17,739	$ 48,302	$ 37,809	$ 74,712