Patronage Capital (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Patronage capital	$ 153,832,674	$ 148,355,246
Patronage capital payable	6,858,367	6,646,068
Patronage capital assigned	148,307,167
Patronage capital to be assigned to members	5,525,507
Retirement of capital credits	48,079	6,761,968	94,278
Excluding Homer Electric Association Retirement [Member]
Retirement of capital credits	48,079	309,188	94,278
Assignable Margins [Member]
Percentage of assignable margins distributed to members	50.00%
Patronage Capital Distribution [Member]
Secured debt covenant restriction	5.00%
Homer Electric Association, Inc. [Member]
Patronage capital	6,900,000	6,600,000	6,500,000
Patronage capital payable	$ 6,900,000	$ 6,600,000
Minimum [Member]
Percentage of aggregate equities and margins to total liabilities and equities and margins	30.00%