Statements Of Operations (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statements Of Operations [Abstract]
Operating revenues	$ 70,269,305	$ 74,776,425	$ 146,368,191	$ 152,524,942
Operating expenses:
Fuel	34,103,354	36,037,367	67,540,605	70,249,319
Production	5,209,049	5,353,464	10,418,246	10,060,684
Purchased power	3,903,066	5,428,871	8,171,426	12,905,983
Transmission	1,485,889	1,833,720	3,053,894	3,458,901
Distribution	3,572,585	3,372,184	6,980,869	6,310,563
Consumer accounts	1,625,927	1,634,902	3,223,119	3,188,039
Administrative, general and other	6,774,905	5,993,334	12,500,758	11,702,739
Depreciation and amortization	10,322,236	10,422,646	20,575,617	20,044,278
Total operating expenses	66,997,011	70,076,488	132,464,534	137,920,506
Interest expense:
Long-term debt and other	5,753,378	6,133,720	11,704,930	12,427,412
Charged to construction	(92,062)	(75,474)	(201,056)	(1,077,540)
Interest expense, net	5,661,316	6,058,246	11,503,874	11,349,872
Net operating margins	(2,389,022)	(1,358,309)	2,399,783	3,254,564
Nonoperating margins:
Interest income	164,795	171,607	332,624	343,860
Allowance for funds used during construction	38,110	34,272	70,956	78,341
Capital credits, patronage dividends and other	46,915	(224,114)	59,266	(211,733)
Total nonoperating margins	249,820	(18,235)	462,846	210,468
Assignable margins	$ (2,139,202)	$ (1,376,544)	$ 2,862,629	$ 3,465,032