Consolidated Statements of Revenues and Expenses - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating revenues:
Sales to Members	$ 348,097	$ 308,776
Sales to non-Members	64	31,002
Total operating revenues	348,161	339,778
Operating expenses:
Fuel	98,952	108,409
Production	103,471	114,759
Depreciation and amortization	53,486	42,652
Purchased power	13,143	13,631
Accretion	8,016	6,382
Deferral of Hawk Road and Smith Energy Facilities effect on net margin		(14,315)
Total operating expenses	277,068	271,518
Operating margin	71,093	68,260
Other income:
Investment income	12,323	9,849
Other	2,301	2,859
Total other income	14,624	12,708
Interest charges:
Interest expense	88,517	87,707
Allowance for debt funds used during construction	(26,380)	(26,253)
Amortization of debt discount and expense	2,982	4,145
Net interest charges	65,119	65,599
Net margin	$ 20,598	$ 15,369