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Long-Term Debt - The Partnership Asset-Based Revolving Credit Facility (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Apr. 26, 2018
Mar. 31, 2017
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Mar. 31, 2018
Dec. 31, 2017
Partnership’s 6% senior notes due April 2021 | Senior Notes                
Line of Credit Facility                
Interest rate (as a percent)     6.00%   6.00%      
Revolving Credit Facility                
Line of Credit Facility                
Commitment fee amount     $ 600,000 $ 500,000 $ 1,100,000 $ 900,000    
Revolving Credit Facility | Exterran Partners, L.P.                
Line of Credit Facility                
Undrawn capacity under revolving credit facility     464,100,000   464,100,000      
Revolving Credit Facility | Exterran Partners, L.P. | Maximum                
Line of Credit Facility                
Undrawn capacity under revolving credit facility     $ 287,600,000   $ 287,600,000      
Revolving Credit Facility | Partnership Credit Facility                
Line of Credit Facility                
Debt instrument, expiration period 5 years              
Revolving credit facility borrowing capacity $ 1,250,000,000           $ 1,100,000,000.0  
Interest rate (as a percent)     3.20%   3.20%      
Debt issuance cost   $ 14,900,000            
Letter of credit outstanding 15,400,000   $ 15,400,000.0   $ 15,400,000.0      
Loss on extinguishment of debt         $ (2,500,000)      
Revolving Credit Facility | Former facility                
Line of Credit Facility                
Amortized deferred financing cost   600,000            
Loss on extinguishment of debt   $ 300,000            
Letter of Credit                
Line of Credit Facility                
Debt issuance cost 3,300,000              
Letter of Credit | Partnership Credit Facility                
Line of Credit Facility                
Revolving credit facility borrowing capacity $ 50,000,000           $ 25,000,000  
Line of Credit                
Line of Credit Facility                
Debt instrument weighted average interest rate (percent)     5.50%   5.50%     4.80%