DISCONTINUED OPERATIONS AND AFFILIATIONS 2 (Details) (USD $)	12 Months Ended				12 Months Ended					1 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Equity Method Investee [Member]	Dec. 31, 2012 Energenic US LLC [Member]	Dec. 31, 2012 Potato Creek, LLC (Potato Creek) [Member]	Apr. 30, 2012 Energenic US LLC [Member] The Energy Network, LLC, TEN Companies and CEN Power I, LLC [Member]	Dec. 31, 2012 Marina Energy LLC [Member] Energenic US LLC [Member]	Dec. 31, 2012 Marina Energy LLC [Member] LVE Energy Partners, LLC (LVE) [Member]	Apr. 30, 2012 Marina Energy LLC [Member] The Energy Network, LLC, TEN Companies and CEN Power I, LLC [Member]
Affiliations [Abstract]
Equity interest				50.00%		30.00%		50.00%	50.00%
Investments in unconsolidated affiliates	$ 94,000,000	$ 14,600,000	$ 100,900,000
Notes Receivable - affiliate	156,700,000	114,700,000
Notes receivable, secured by property, plant and equipment of affiliates	99,900,000
Interest accrual on secured notes receivable					7.50%
Repayment period, latest date	2025
Notes receivable, unsecured	56,800,000
Net asset - included in investment in affiliates and other noncurrent liabilities	73,900,000
Combined equity contributions and the notes receivable - affiliate	233,600,000
Equity Method Investment, Summarized Financial Information [Abstract]
Current assets	57,711,000	26,390,000
Noncurrent assets	759,996,000	625,556,000
Current liabilities	211,628,000	71,375,000
Noncurrent liabilities	460,560,000	540,166,000
Revenues	148,009,000	95,647,000	75,476,000
Cost of sales	71,141,000	64,181,000	52,187,000
Net Income (loss)	5,795,000	1,522,000	(3,536,000)
Acquisition purchase price							50,500,000
Capital contributions										7,600,000
Advances										$ 35,400,000