AFFILIATIONS AND DISCONTINUED OPERATIONS - Summarized Financial Information (Details) $ in Thousands		12 Months Ended
	Dec. 31, 2015 USD ($) investment agreement	Dec. 31, 2015 USD ($) investment agreement	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Affiliations [Abstract]
Notes receivable from affiliate	$ 16,400	$ 16,400	$ 51,500
Notes receivable from affiliate, current	3,134	3,134	14,657
Notes receivable from third party	35,439	35,439	7,882
Net investments in (repayments from) unconsolidated affiliates		18,000	(2,400)	$ (9,600)
Notes receivable secured by property, plant, and equipment of affiliates	13,700	$ 13,700
Interest accrual on secured notes receivable		7.50%
Repayment period, latest date		2025
Unsecured notes receivable	2,700	$ 2,700
Net asset - included in investment in affiliates and other noncurrent liabilities	17,000	17,000
Combined equity contributions and the notes receivable - affiliate		33,400
Equity Method Investment, Summarized Financial Information [Abstract]
Goodwill	8,880	8,880	0
Current assets	21,914	21,914	46,683
Noncurrent assets	117,091	117,091	478,240
Current liabilities	47,797	47,797	75,260
Noncurrent liabilities	112,438	112,438	315,801
Revenues		163,479	207,031	178,026
Cost of sales		86,452	107,042	91,228
(Loss) Income from continuing operations		(56,962)	(11,666)	6,229
Net (Loss) Income		$ (56,962)	$ (11,666)	6,229
Energenic US LLC [Member]
Affiliations [Abstract]
Gain on project prior to exchange	$ 2,700
Potato Creek, LLC (Potato Creek) [Member]
Affiliations [Abstract]
Equity interest	30.00%	30.00%
Marina Energy LLC [Member] | Energenic US LLC [Member]
Affiliations [Abstract]
Equity interest	50.00%	50.00%
Number of distribution and purchase agreements | agreement	2	2
Number of investments owned | investment	8	8
Notes receivable from affiliate	$ 19,500	$ 19,500
Notes receivable from affiliate, current	$ 1,800	$ 1,800
Percentage of fair value of assets acquired and liabilities assumed	100.00%	100.00%
Consideration received	$ 46,100
Fair value of the interest in Partner Projects exchanged	14,600
Equity Method Investment, Summarized Financial Information [Abstract]
Current assets (excluding inventory)	7,804	$ 7,804
Inventory	3,154	3,154
Note Receivable Received	19,504	19,504
Fixed Assets	40,854	40,854
Identifiable Intangibles	21,553	21,553
Goodwill	8,880	8,880
Noncurrent assets	1,873	1,873
Current liabilities	(8,196)	(8,196)
Current Liabilities	16,986	16,986
Long-Term Debt, including current portion	(21,457)	(21,457)
Capital Lease Payable	(10,357)	(10,357)
Noncurrent liabilities	(572)	(572)
Fair Value of Consolidated Assets and Liabilities of Acquired Projects	$ 46,054	$ 46,054
Marina Energy LLC [Member] | Energenic US LLC [Member] | Co-venturer [Member]
Affiliations [Abstract]
Number of investments owned | investment	7	7
Fair value of the interest in Partner Projects exchanged	$ 31,500
Marina Energy LLC [Member] | LVE Energy Partners, LLC (LVE) [Member]
Affiliations [Abstract]
Equity interest	50.00%	50.00%
Marina Energy LLC [Member] | LVE Energy Partners, LLC (LVE) [Member] | LVE Energy Partners [Member]
Affiliations [Abstract]
Proceeds from sale of interest in joint venture				57,900
Charge incurred to write-off the remaining interest				$ 800
SJI Midstream, LLC [Member] | PennEast Pipeline Company, LLC (PennEast) [Member]
Affiliations [Abstract]
Equity interest	20.00%	20.00%