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Transactions Related to the Partnership (Details)
hp in Thousands, $ in Thousands
 1 Months Ended 3 Months Ended 9 Months Ended
May. 31, 2015
USD ($)
Apr. 30, 2015
USD ($)
compressor_unit
customer
hp
shares
Apr. 30, 2014
USD ($)
shares
Sep. 30, 2015
USD ($)
Sep. 30, 2014
USD ($)
Sep. 30, 2015
USD ($)
shares
Sep. 30, 2014
USD ($)
Transactions related to the partnership              
Net proceeds from the sale of Partnership units           $ 1,164 $ 169,471
Proceeds from issuance of general partner units             0
Schedule of changes in net income and ownership interest              
Net income attributable to Exterran stockholders       $ (6,304) $ 34,050 24,449 79,023
Increase in Exterran stockholders’ additional paid-in capital for change in ownership of Partnership units           18,386 74,521
Change from net income attributable to Exterran stockholders and transfers to/from the noncontrolling interest           $ 42,835 $ 153,544
Subsidiary | Exterran Partners, L.P.              
Transactions related to the partnership              
Number of partnership customers with service agreements | customer   60          
Number of compressor units used to provide compression services | compressor_unit   238          
Horsepower of compressor units used to provide compression services | hp   148          
Percentage of available horsepower of combined U.S. contract operations business from service agreements sold to the partnership   3.00%          
Number of compressor units sold | compressor_unit   179          
Horsepower of compressor units sold | hp   66          
Consideration received for sale of assets   $ 102,300          
Limited Partner Units | ATM Agreement | Exterran Partners, L.P.              
Transactions related to the partnership              
Maximum aggregate offering price $ 100,000            
Sale of common units (in units) | shares           49,774  
Net proceeds from the sale of Partnership units           $ 1,200  
Common units | Exterran Partners, L.P.              
Transactions related to the partnership              
Sale of common units (in units) | shares     6,210,000        
Net proceeds from the sale of Partnership units     $ 169,500        
Units issued (in units) | shares   4,000,000          
Common units | Exterran Partners, L.P. | Over-Allotment Option              
Transactions related to the partnership              
Sale of common units (in units) | shares     810,000        
General partner units | Exterran Partners, L.P.              
Transactions related to the partnership              
Units issued (in units) | shares   80,000          
Proceeds from issuance of general partner units     $ 3,600        
General partner units issued and sold (in units) | shares     126,000        
Approximate general partner interest in limited partnership (as a percent)     2.00%