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Transactions Related to the Partnership (Details) (USD $) | 3 Months Ended | 9 Months Ended | 1 Months Ended
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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 |  |  |  |  |

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