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DISCONTINUED OPERATIONS AND AFFILIATIONS 2 (Details) (USD $)
9 Months Ended 1 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Sep. 30, 2013
Energenic US LLC [Member]
Sep. 30, 2013
Potato Creek, LLC (Potato Creek) [Member]
Sep. 30, 2013
LVE Energy Partners, LLC (LVE) [Member]
Apr. 30, 2012
Marina Energy LLC [Member]
Energenic US LLC [Member]
Sep. 30, 2013
Marina Energy LLC [Member]
Energenic US LLC [Member]
Apr. 30, 2007
Marina Energy LLC [Member]
LVE Energy Partners, LLC (LVE) [Member]
Sep. 30, 2013
LVE Energy Partners [Member]
Marina Energy LLC [Member]
LVE Energy Partners, LLC (LVE) [Member]
Affiliations [Abstract]                    
Equity interest (in hundredths)       50.00% 30.00% 50.00%   50.00% 50.00%  
Advances             $ 35,400,000      
Proceeds from sale of joint venture                   57,600,000
Investments in unconsolidated affiliates 12,900,000 91,100,000                
Notes Receivable - affiliate 77,300,000   156,700,000              
Notes receivable, secured by property, plant and equipment of affiliates 69,200,000                  
Interest accrual on secured notes receivable (in hundredths) 7.50%                  
Repayment period, latest date 2025                  
Notes receivable - affiliate 9,645,000   39,495,000             8,100,000
Net asset - included in investment in affiliates and other noncurrent liabilities 77,900,000                  
Combined equity contributions and the notes receivable - affiliate $ 157,300,000