v3.5.0.2
LONG-TERM DEBT - Additional Information (Details) - USD ($)
$ in Thousands
2 Months Ended 3 Months Ended 7 Months Ended 9 Months Ended
Aug. 04, 2016
Apr. 01, 2016
Feb. 27, 2015
Feb. 28, 2015
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Nov. 15, 2013
Long-Term Debt                      
Draw from credit facility to finance cash consideration               $ 15,000      
Cash payment for contributed assets                 $ 99,500    
Financing costs expense                 346    
Interest expense         $ 3,979 $ 1,973   10,133 8,671    
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         173,500     173,500      
Amortization of deferred financing costs               1,692 $ 1,001    
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             $ 1,700        
Allocated weighted average long-term debt             54,400        
Amortization of deferred financing costs             200        
Revolving Credit Facility | Credit Agreement                      
Long-Term Debt                      
Interest expense         3,300 $ 1,800 $ 4,100 8,400      
Maximum borrowing capacity         173,700     173,700      
Deferred loan costs         1,569     1,569   $ 3,261  
Long-term debt         $ 171,943     $ 171,943   $ 228,474  
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
Panola I Processing Plant and Murvaul Pipeline | Disposed of by Sale, Not Discontinued Operations                      
Long-Term Debt                      
Proceeds from the sales of assets used to pay down debt under the senior secured revolving credit facility (the "Credit Agreement") $ 41,000