Deferred Charges And Liabilities (Schedule Of Deferred Charges, Or Regulatory Assets) (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Regulatory Assets [Line Items]
Total deferred charges	$ 25,140,957	$ 16,811,756
Total deferred charges	25,140,957	16,811,756
Debt Issuance And Reacquisition Costs [Member]
Regulatory Assets [Line Items]
Total deferred charges	492,850	247,481
Refurbishment Of Transmission Equipment [Member]
Regulatory Assets [Line Items]
Total deferred charges	104,939	114,198
Feasibility Studies [Member]
Regulatory Assets [Line Items]
Total deferred charges	1,387,285	551,122
Beluga Gas Compression [Member]
Regulatory Assets [Line Items]
Total deferred charges	0	508,866
Cooper Lake Relicensing / Projects [Member]
Regulatory Assets [Line Items]
Total deferred charges	5,280,006	5,410,109
Fuel Supply [Member]
Regulatory Assets [Line Items]
Total deferred charges	2,005,052	939,768
Storm Damage [Member]
Regulatory Assets [Line Items]
Total deferred charges	647,381	841,595
Other Regulatory Deferred Charges [Member]
Regulatory Assets [Line Items]
Total deferred charges	849,933	1,056,909
Bond Interest - Market Risk Management [Member]
Regulatory Assets [Line Items]
Total deferred charges	5,365,190	5,871,286
Environmental Matters [Member]
Regulatory Assets [Line Items]
Total deferred charges	1,024,171	1,069,522
Regulatory Assets Excluding Other Deferred Charges [Member]
Regulatory Assets [Line Items]
Total deferred charges	17,156,807	16,610,856
NRECA Retirement Security Plan [Member]
Regulatory Assets [Line Items]
Total deferred charges	7,925,050	0
Post Retirement Benefit Obligation [Member]
Regulatory Assets [Line Items]
Total deferred charges	59,100	200,900
Other Deferred Charges [Member]
Regulatory Assets [Line Items]
Total deferred charges	$ 7,984,150	$ 200,900