Statements Of Operations (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statements Of Operations [Abstract]
Operating revenues	$ 76,098,886	$ 77,748,517
Operating expenses:
Fuel	33,437,251	34,211,952
Production	5,209,197	4,707,220
Purchased power	4,268,360	7,477,112
Transmission	1,568,005	1,625,181
Distribution	3,408,284	2,938,379
Consumer accounts	1,597,192	1,553,137
Administrative, general and other	5,725,853	5,709,405
Depreciation and amortization	10,253,381	9,621,632
Total operating expenses	65,467,523	67,844,018
Interest expense:
Long-term debt and other	5,951,552	6,293,692
Charged to construction	(108,994)	(1,002,066)
Interest expense, net	5,842,558	5,291,626
Net operating margins	4,788,805	4,612,873
Nonoperating margins:
Interest income	167,829	172,253
Allowance for funds used during construction	32,846	44,069
Capital credits, patronage dividends and other	12,351	12,381
Total nonoperating margins	213,026	228,703
Assignable margins	$ 5,001,831	$ 4,841,576