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Long-Term Debt - Senior Notes (Details) - USD ($) | 1 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Apr. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014
Debt Instrument [Line Items] |  |  |  |
Proceeds from borrowings of long-term debt |  | $ 1,055,000,000 | $ 1,849,799,000 |
Partnership's 6% senior notes due 2022 | Exterran Partners, L.P. |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate (as a percent) | 6.00% | 6.00% |  | 6.00%
Principle amount of senior notes | $ 350,000,000.0 |  |  |
Proceeds from borrowings of long-term debt | 337,400,000 |  |  |
Debt issuance cost | 6,900,000 |  |  |
Amount of unamortized discount of notes | $ 5,700,000 | $ 4,800,000 |  | $ 5,200,000
Effective interest rate (as a percent) | 6.25% |  |  |

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