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TRANSACTIONS RELATED TO THE PARTNERSHIP (Details) (USD $)
 1 Months Ended 3 Months Ended 9 Months Ended 1 Months Ended
Mar. 31, 2012
Jun. 30, 2011
May 31, 2011
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
May 31, 2012
Exterran Partners, L.P.
Mar. 31, 2012
Exterran Partners, L.P.
customer
hp
MMcfperDay
item
Jun. 30, 2011
Exterran Partners, L.P.
MMcfperDay
hp
customer
item
May 31, 2011
Exterran Partners, L.P.
Mar. 31, 2011
Exterran Partners, L.P.
Transactions related to the partnership                        
Number of partnership customers with service agreements                 39 34    
Number of compressor units used to provide compression services                 406 407    
Horsepower of compressor units used to provide compression services                 188,000 289,000    
Percentage of available horsepower of combined U.S. contract operations business from service agreements sold to the partnership                 5.00% 8.00%    
Compressor units sold                 139 207    
Horsepower of compressor units sold                 75,000 98,000    
Capacity of natural gas processing plant sold (MMcf per day)                 10 8    
Consideration received for sale of assets                 $ 182,800,000 $ 223,000,000    
Debt assumed by the partnership as part of the consideration for the sale of assets                 105,400,000 159,400,000    
Cash received from the partnership as part of the consideration for the sale of assets                 77,400,000 62,200,000    
Sale of common units                 4,965,000   5,134,175 5,914,466
Common units to cover over-allotments                 465,000   134,175 664,466
Net proceeds from the sale of Partnership units           114,530,000 289,908,000   114,500,000   127,700,000 162,200,000
Repayment of borrowings outstanding under the revolving credit facility           1,630,621,000 1,804,578,000 64,800,000        
Approximate general partner interest in limited partnership (as a percent) 2.00%   2.00%                  
Schedule of changes in net income and ownership interest                        
Net income (loss) attributable to Exterran stockholders       113,366,000 (215,974,000) (33,747,000) (274,030,000)          
Increase in Exterran stockholders additional paid in capital for sale of Partnership units           49,202,000 123,904,000          
Change from net loss attributable to Exterran stockholders and transfers to the noncontrolling interest           $ 15,455,000 $ (150,126,000)          
General partner units acquired to maintain ownership percentage 101,000 51,000 53,000