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Accounting for Derivatives - Interest Rate Risk (Details) - USD ($) | 9 Months Ended
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Sep. 30, 2015 | Sep. 30, 2014
Fair Value Asset (Liability) |  |
Interest income recorded due to ineffectiveness related to interest rate swaps | $ 400,000 | $ 0
Deferred pre-tax losses to be reclassified during next 12 months | 4,700,000 |
Derivatives designated as hedging instruments: | Interest rate swaps | Exterran Partners, L.P. |  |
Fair Value Asset (Liability) |  |
Notional value of interest rate swaps entered into during the period | 100,000,000 |
Notional amount of interest rate swaps | $ 500,000,000 |
Weighted average effective fixed interest rate on interest rate swaps (as a percent) | 1.60% |
Derivatives designated as hedging instruments: | Interest rate swaps | Derivative expiring in 2018 | Exterran Partners, L.P. |  |
Fair Value Asset (Liability) |  |
Notional amount of interest rate swaps | $ 300,000,000 |
Derivatives designated as hedging instruments: | Interest rate swaps | Derivative expiring in 2019 | Exterran Partners, L.P. |  |
Fair Value Asset (Liability) |  |
Notional amount of interest rate swaps | 100,000,000 |
Derivatives designated as hedging instruments: | Interest rate swaps | Derivative expiring in 2020 | Exterran Partners, L.P. |  |
Fair Value Asset (Liability) |  |
Notional amount of interest rate swaps | $ 100,000,000 |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition The net gain (loss) recognized in earnings during the reporting period representing the amount of the cash flow hedges' ineffectiveness. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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- Definition The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994 + Details
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