v3.4.0.3
PARTNERSHIP EQUITY AND DISTRIBUTIONS - Narrative (Details) - $ / shares
3 Months Ended
May. 10, 2016
Apr. 01, 2016
Feb. 01, 2016
Aug. 06, 2015
Mar. 31, 2016
Dec. 31, 2015
Apr. 01, 2015
Partnership Equity and Distributions              
General partner units, outstanding         429,365    
General partner ownership interest         1.90%    
Distribution period         45 days    
Minimum quarterly distribution per unit (in dollars per share)         $ 0.35    
Annualized minimum quarterly distribution per unit (in dollars per share)         $ 1.40    
Minimum quarterly distribution in the event that the distributions are reinstated after the temporary suspension of dividends     $ 0.35        
Incentive distribution rights, units outstanding         100 100  
Common units' right to receive distributions of available cash from operating surplus each quarter before any distributions may be made on the subordinated units (in dollars per share)         $ 0.35    
Settlement Agreement with AES and NuDevco              
Partnership Equity and Distributions              
Incentive distribution rights, units outstanding   90          
Azure              
Partnership Equity and Distributions              
General partner ownership interest         1.93%    
NuDevco | Subsequent Event | Settlement Agreement with AES and NuDevco              
Partnership Equity and Distributions              
Number of IDR units to be surrendered (in shares)   10          
Common Units              
Partnership Equity and Distributions              
Limited partner's capital, units outstanding (in shares)         13,064,218 13,044,654  
Common Units | Settlement Agreement with AES and NuDevco              
Partnership Equity and Distributions              
Limited partner's capital, units outstanding (in shares)   11,100,000         11,124,953
Common Units | ETG System              
Partnership Equity and Distributions              
Units issued as consideration (in shares)       255,319      
Common Units | Azure              
Partnership Equity and Distributions              
Limited partner's capital, units outstanding (in shares) 255,319       255,319    
Limited partner's ownership percentage 2.30%       1.20%    
Common Units | Azure | ETG System              
Partnership Equity and Distributions              
Units issued as consideration (in shares)       255,319      
Common Units | NuDevco              
Partnership Equity and Distributions              
Limited partner's capital, units outstanding (in shares)         1,939,265    
Limited partner's ownership percentage         8.90%    
Common Units | NuDevco | Subsequent Event | Settlement Agreement with AES and NuDevco              
Partnership Equity and Distributions              
Number of limited partner units surrendered (in shares   1,939,265          
Common Units | Publicly Held Units              
Partnership Equity and Distributions              
Limited partner's capital, units outstanding (in shares) 10,869,634       10,869,634    
Limited partner's ownership percentage 97.70%       49.90%    
Subordinate Units              
Partnership Equity and Distributions              
Limited partner's capital, units outstanding (in shares)         8,724,545 8,724,545  
Subordinate Units | Settlement Agreement with AES and NuDevco              
Partnership Equity and Distributions              
Limited partner's capital, units outstanding (in shares)   0          
Subordinate Units | NuDevco              
Partnership Equity and Distributions              
Limited partner's capital, units outstanding (in shares)         8,724,545    
Limited partner's ownership percentage         40.00%    
Subordinate Units | NuDevco | Subsequent Event | Settlement Agreement with AES and NuDevco              
Partnership Equity and Distributions              
Limited partner's capital, units outstanding (in shares)   11,124,953          
Number of limited partner units surrendered (in shares   8,724,545          
Number of IDR units to be surrendered (in shares)   1,939,265          
Incentive Distribution Rights [Member]              
Partnership Equity and Distributions              
Incentive distribution rights, units outstanding         90    
Incentive Distribution Rights [Member] | First Target Distribution              
Partnership Equity and Distributions              
Percentage of quarterly distributions of available cash from operating surplus for distributions         13.00%    
Target distribution per unit per quarter (in dollars per share)         $ 0.4025    
Incentive Distribution Rights [Member] | Second Target Distribution              
Partnership Equity and Distributions              
Percentage of quarterly distributions of available cash from operating surplus for distributions         23.00%    
Target distribution per unit per quarter (in dollars per share)         $ 0.4375    
Incentive Distribution Rights [Member] | Third Target Distribution              
Partnership Equity and Distributions              
Percentage of quarterly distributions of available cash from operating surplus for distributions         48.00%    
Target distribution per unit per quarter (in dollars per share)         $ 0.5250    
Incentive Distribution Rights [Member] | Azure              
Partnership Equity and Distributions              
Percentage of incentive distribution rights owned         90.00%    
Incentive Distribution Rights [Member] | NuDevco              
Partnership Equity and Distributions              
Percentage of incentive distribution rights owned         10.00%    
Incentive distribution rights, units outstanding         10    
Incentive Distribution Rights [Member] | Maximum              
Partnership Equity and Distributions              
Percentage of quarterly distributions of available cash from operating surplus for distributions         48.00%    
Azure              
Partnership Equity and Distributions              
Other ownership interest, ownership percentage         100.00%