v3.5.0.2

LONG-TERM DEBT - Additional Information (Details) - USD ($) $ in Thousands				1 Months Ended	2 Months Ended	3 Months Ended		4 Months Ended	6 Months Ended
	Jun. 30, 2016	Apr. 01, 2016	Feb. 27, 2015	Oct. 31, 2015	Feb. 28, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015	Nov. 15, 2013
Long-Term Debt
Amount outstanding									$ 15,000
Cash payment for contributed assets										$ 99,500
Financing costs expense										272
Interest expense						$ 3,153	$ 3,225		6,154	6,698
Amount of debt that will become due and payable if the Partnership remains out of compliance with all of the restrictive covenants under the Credit Agreement	$ 214,500					214,500			214,500
Amortization of deferred financing costs									980	$ 823
Azure Credit Agreement
Long-Term Debt
Interest expense					$ 2,300
Weighted average interest rate					6.50%
Allocated weighted average long-term debt					$ 192,000
Amortization of deferred financing costs					$ 300
Settlement Agreement with AES and NuDevco
Long-Term Debt
Proceeds from issuance of letter of credit, used to pay down debt under Credit Agreement		$ 15,000
ETG System | Azure Credit Agreement
Long-Term Debt
Interest expense							1,200	$ 1,700
Allocated weighted average long-term debt								54,400
Amortization of deferred financing costs							200	200
Revolving Credit Facility | Credit Agreement
Long-Term Debt
Interest expense						2,600	$ 1,700	$ 2,300	5,200
Deferred loan costs	2,281					2,281			2,281		$ 3,261
Revolving Credit Facility | Credit Agreement, Second Amendment
Long-Term Debt
Financing costs expense				$ 700
Maximum borrowing capacity				$ 238,000
Revolving Credit Facility | Credit Agreement, Fourth Amendment
Long-Term Debt
Financing costs expense	900
Maximum borrowing capacity	214,700					214,700			214,700
Amount of debt that will become due and payable if the Partnership remains out of compliance with all of the restrictive covenants under the Credit Agreement	$ 214,500					$ 214,500			$ 214,500
Revolving Credit Facility | Azure | Azure Credit Agreement
Long-Term Debt
Long-term debt												$ 50,000
Revolving Credit Facility | LIBOR | Minimum | Credit Agreement
Long-Term Debt
Debt instrument, basis spread on variable rate			3.25%
Revolving Credit Facility | LIBOR | Maximum | Credit Agreement
Long-Term Debt
Debt instrument, basis spread on variable rate			4.25%
Revolving Credit Facility | Base Rate | Minimum | Credit Agreement
Long-Term Debt
Debt instrument, basis spread on variable rate			2.25%
Revolving Credit Facility | Base Rate | Maximum | Credit Agreement
Long-Term Debt
Debt instrument, basis spread on variable rate			3.25%
Term Loan | Azure | Azure Credit Agreement
Long-Term Debt
Long-term debt												$ 550,000

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The cash payment portion of the aggregate consideration, consisting of cash and the issuance of IDR units, transferred in exchange for the contribution of the legacy system to the entity, in a transaction that was not accounted for as a business combination since it is considered to be the predecessor of the entity.

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The proceeds from the issuance of the letter of credit, issued by the related party's bank, to pay down the existing debt under the Credit Agreement.

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Face (par) amount of debt instrument at time of issuance.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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