Long-Term Debt (Details Textual) (USD $)			9 Months Ended	12 Months Ended	9 Months Ended		9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 City Wood River Facility [Member]	Dec. 31, 2008 City Wood River Facility [Member]	Sep. 30, 2012 Senior Debt Facility [Member]	Sep. 28, 2012 Senior Debt Facility [Member]	Sep. 30, 2012 Capital Lease Obligations [Member]
Debt Instrument, Periodic Payment			$ 58,000		$ 3,150,000
Long-term Debt, Gross					170,500,000
Debt Instrument, Description of Variable Rate Basis					Interest rates on the Senior Debt Facility are, at management''s option, set at: i) a base rate, which is the higher of the federal funds rate plus 0.5% or the administrative agent''s prime rate, in each case plus a margin of 2.0%; or ii) at LIBOR plus 3.0%.
Long-term Debt, Weighted Average Interest Rate					3.30%
Management Fee Monthly					869,000
Debt Issuance Costs					7,900,000
Debt issuance costs, net	1,990,000	2,763,000			1,900,000
Fixed Facilities Charges Monthly Based On Cost Of Substation and Distribution Facility							34,000
Minimum Energy Charge							25,000
Proceeds from Notes Payable				419,000
Debt Instrument, Interest Rate, Stated Percentage	7.85%		6.50%
Debt Instrument, Maturity Date			Dec. 31, 2018
Total	$ 173,239,000	$ 179,647,000				$ 3,600,000