v3.4.0.3
SIGNIFICANT ACCOUNTING POLICIES - Other Policies (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2016
USD ($)
segment
Mar. 31, 2015
USD ($)
Dec. 31, 2015
USD ($)
Significant Accounting Policies      
Allowance for doubtful accounts $ 0   $ 0
Interest capitalized during the period 0 $ 0  
Deferred loan costs $ 2,885   3,261
Number of operating segments | segment 2    
Asset retirement obligations $ 0   0
Liability for deferred taxes $ 700   1,100
Credit Concentration Risk | Trade Accounts Receivable | AES      
Significant Accounting Policies      
Concentration risk (as a percent) 27.90%    
Credit Concentration Risk | Trade Accounts Receivable | BP Plc      
Significant Accounting Policies      
Concentration risk (as a percent) 20.10%    
Azure System Predecessor      
Significant Accounting Policies      
Liability for deferred taxes $ 700   1,100
Scheduled Maintenance Projects      
Significant Accounting Policies      
Property, plant and equipment, Estimated useful lives 5 years    
Natural gas gathering agreement with a minimum revenue commitment (“MRC”)      
Significant Accounting Policies      
Agreement period 10 years    
Deferred revenue $ 18,500   $ 11,600
Deferred revenue, revenue recognized $ 0 $ 0