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Transactions Related to the Partnership (Details) (USD $)
 3 Months Ended 9 Months Ended 1 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Mar. 31, 2013
Subsidiary
Exterran Partners, L.P.
CompressorUnit
hp
customer
Apr. 30, 2014
Exterran Partners, L.P.
Common units
Mar. 31, 2013
Exterran Partners, L.P.
Common units
Apr. 30, 2014
Exterran Partners, L.P.
General partner units
Mar. 31, 2013
Exterran Partners, L.P.
General partner units
Transactions related to the partnership                  
Sale of common units (in shares)           6,210,000      
Common units to cover over-allotments (in shares)           810,000      
Net proceeds from the sale of Partnership units     $ 169,471,000     $ 169,500,000      
Proceeds from issuance of general partner units               3,600,000  
General partner units issued and sold (in shares)               126,000  
Approximate general partner interest in limited partnership (as a percent)               2.00%  
Number of partnership customers with service agreements         50        
Number of compressor units used to provide compression services         363        
Horsepower of compressor units used to provide compression services         256,000        
Percentage of available horsepower of combined U.S. contract operations business from service agreements sold to the partnership         8.00%        
Number of compressor units sold         204        
Horsepower of compressor units sold         99,000        
Horsepower previously leased from related party and transferred to related party along with transferred contracts         6,000        
Consideration received for sale of assets         174,000,000        
Units issued (in shares)             7,100,000   145,000
Schedule of changes in net income and ownership interest                  
Net income attributable to Exterran stockholders 34,050,000 40,977,000 79,023,000 100,517,000          
Increase in Exterran stockholders' additional paid-in capital for change in ownership of Partnership units     74,521,000 31,573,000          
Change from net income attributable to Exterran stockholders and transfers to/from the noncontrolling interest     $ 153,544,000 $ 132,090,000