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Stock-Based Compensation - Partnership Long Term Inncetive Plan and Phantom Unit Activity (Narratives) (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2017 | Apr. 30, 2017
Partnership Phantom Units |  |
Unrecognized compensation |  |
Expected unrecognized compensation cost related to unvested awards (in dollars) | $ 2.0 |
Weighted-average period over which the expected unrecognized compensation cost related to unvested stock options will be recognized | 2 years 2 months 18 days |
Partnership Long Term Incentive Plan |  |
Stock-Based Compensation |  |
Maximum number of shares available under the Plan |  | 2,000,000
Exterran Partners, L.P. | Partnership Long Term Incentive Plan | Partnership Phantom Units | First anniversary vesting |  |
Stock-Based Compensation |  |
Vesting percentage | 33.33% |
Exterran Partners, L.P. | Partnership Long Term Incentive Plan | Partnership Phantom Units | Second anniversary vesting |  |
Stock-Based Compensation |  |
Vesting percentage | 33.33% |
Exterran Partners, L.P. | Partnership Long Term Incentive Plan | Partnership Phantom Units | Third anniversary vesting |  |
Stock-Based Compensation |  |
Vesting percentage | 33.33% |
Vesting period | 3 years |

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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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