Statements Of Operations - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statements Of Operations [Abstract]
Operating revenues	$ 44,622,517	$ 47,697,820	$ 94,872,652	$ 122,670,937
Operating expenses:
Fuel	11,946,563	13,185,841	25,835,500	43,017,838
Production	4,044,758	4,089,615	7,893,027	8,657,297
Purchased power	4,241,600	4,729,596	8,190,828	11,336,198
Transmission	1,338,879	1,489,944	2,715,746	3,053,626
Distribution	3,414,636	3,591,277	6,760,579	6,841,841
Consumer accounts	1,562,887	1,586,015	3,195,100	3,127,606
Administrative, general and other	6,228,353	6,049,377	12,058,320	12,144,723
Depreciation and amortization	8,695,032	8,768,893	17,182,680	18,762,705
Total operating expenses	41,472,708	43,490,558	83,831,780	106,941,834
Interest expense:
Long-term debt and other	5,352,456	5,503,640	10,836,220	11,212,552
Charged to construction	(105,051)	(122,473)	(203,604)	(242,012)
Interest expense, net	5,247,405	5,381,167	10,632,616	10,970,540
Net operating margins	(2,097,596)	(1,173,905)	408,256	4,758,563
Nonoperating margins:
Interest income	83,221	78,740	164,337	146,837
Allowance for funds used during construction	43,449	46,070	84,211	91,035
Capital credits, patronage dividends and other	1,200	1,200	2,400	2,400
Total nonoperating margins	127,870	126,010	250,948	240,272
Assignable margins	$ (1,969,726)	$ (1,047,895)	$ 659,204	$ 4,998,835