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Long-Term Debt (Details 9) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Mar. 31, 2013
Apr. 30, 2014
Long-Term Debt Maturity Schedule        
2016 $ 375,729,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo      
2017 234,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree      
2018 960,234,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour      
2019 234,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive      
Thereafter 700,176,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive      
Total debt 2,036,607,000us-gaap_DebtInstrumentCarryingAmount      
Exterran Partners, L.P.        
Long-Term Debt        
Amount of unamortized discount of notes 9,700,000us-gaap_DebtInstrumentUnamortizedDiscount
/ dei_LegalEntityAxis
= exh_ExterranPartnersLPMember
     
Exterran Partners, L.P. | Partnership's 6% senior notes due 2021        
Long-Term Debt        
Amount of unamortized discount of notes 4,500,000us-gaap_DebtInstrumentUnamortizedDiscount
/ dei_LegalEntityAxis
= exh_ExterranPartnersLPMember
/ us-gaap_LongtermDebtTypeAxis
= exh_PartnershipsSeniorNotesDue2021Member
5,000,000us-gaap_DebtInstrumentUnamortizedDiscount
/ dei_LegalEntityAxis
= exh_ExterranPartnersLPMember
/ us-gaap_LongtermDebtTypeAxis
= exh_PartnershipsSeniorNotesDue2021Member
5,500,000us-gaap_DebtInstrumentUnamortizedDiscount
/ dei_LegalEntityAxis
= exh_ExterranPartnersLPMember
/ us-gaap_LongtermDebtTypeAxis
= exh_PartnershipsSeniorNotesDue2021Member
 
Exterran Partners, L.P. | Partnership's 6% senior notes due 2022        
Long-Term Debt        
Amount of unamortized discount of notes $ 5,200,000us-gaap_DebtInstrumentUnamortizedDiscount
/ dei_LegalEntityAxis
= exh_ExterranPartnersLPMember
/ us-gaap_LongtermDebtTypeAxis
= exh_PartnershipSeniorNotesDue2022Member
    $ 5,700,000us-gaap_DebtInstrumentUnamortizedDiscount
/ dei_LegalEntityAxis
= exh_ExterranPartnersLPMember
/ us-gaap_LongtermDebtTypeAxis
= exh_PartnershipSeniorNotesDue2022Member