Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating revenues
Other	$ 10,890	$ 14,256
Operating revenues	319,466	339,917
Operating expenses
Purchased power	71,015	70,956
Fuel	61,069	85,149
Production	43,188	47,761
Transmission	41,540	39,142
General and administrative	16,215	10,813
Depreciation, amortization and depletion	47,024	38,145
Coal mining	2,734	3,596
Other	7,683	3,838
Operating expenses	290,468	299,400
Operating margins	28,998	40,517
Other income
Interest	1,305	1,415
Capital credits from cooperatives	3,353	2,997
Other	(250)	1,281
Total other income	4,408	5,693
Interest expense
Interest	38,867	40,652
Interest charged during construction	(1,961)	(2,371)
Interest expense, net of amounts capitalized	36,906	38,281
Income tax benefit	(209)	(77)
Net margins including noncontrolling interest	(3,291)	8,006
Net margin attributable to noncontrolling interest	(1,319)	(1,017)
Net margins attributable to the Association	(4,610)	6,989
Member electric sales
Operating revenues
Operating revenues	292,763	298,931
Non-member electric sales
Operating revenues
Operating revenues	$ 15,813	$ 26,730