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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Cash flows from operating activities:      
Net income $ 61,719us-gaap_IncomeLossAttributableToParent $ 64,023us-gaap_IncomeLossAttributableToParent $ 10,509us-gaap_IncomeLossAttributableToParent
Adjustments to reconcile net income to cash provided by operating activities:      
Depreciation and amortization 128,196us-gaap_DepreciationDepletionAndAmortization 103,711us-gaap_DepreciationDepletionAndAmortization 88,298us-gaap_DepreciationDepletionAndAmortization
Long-lived asset impairment 12,810us-gaap_ImpairmentOfLongLivedAssetsHeldForUse 5,350us-gaap_ImpairmentOfLongLivedAssetsHeldForUse 29,560us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
Amortization of deferred financing costs 2,973us-gaap_AmortizationOfFinancingCosts 2,975us-gaap_AmortizationOfFinancingCosts 1,508us-gaap_AmortizationOfFinancingCosts
Amortization of debt discount 1,042us-gaap_AmortizationOfDebtDiscountPremium 419us-gaap_AmortizationOfDebtDiscountPremium  
Amortization of terminated interest rate swaps 3,667exlp_AmortizationOfPaymentsToTerminateInterestRateSwaps 2,737exlp_AmortizationOfPaymentsToTerminateInterestRateSwaps 898exlp_AmortizationOfPaymentsToTerminateInterestRateSwaps
Interest rate swaps 397us-gaap_UnrealizedGainLossOnDerivatives 334us-gaap_UnrealizedGainLossOnDerivatives  
Unit-based compensation expense 1,376us-gaap_ShareBasedCompensation 1,174us-gaap_ShareBasedCompensation 797us-gaap_ShareBasedCompensation
Provision for (benefit from) doubtful accounts 1,060us-gaap_ProvisionForDoubtfulAccounts (25)us-gaap_ProvisionForDoubtfulAccounts 494us-gaap_ProvisionForDoubtfulAccounts
Gain on sale of property, plant and equipment (2,466)us-gaap_GainLossOnDispositionOfAssets (10,140)us-gaap_GainLossOnDispositionOfAssets (689)us-gaap_GainLossOnDispositionOfAssets
Changes in assets and liabilities, net of acquisitions:      
Accounts receivable, trade (27,871)us-gaap_IncreaseDecreaseInAccountsReceivable (14,532)us-gaap_IncreaseDecreaseInAccountsReceivable (5,303)us-gaap_IncreaseDecreaseInAccountsReceivable
Other assets and liabilities 2,861us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet 2,260us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet (855)us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet
Net cash provided by operating activities 185,764us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations 158,286us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations 125,217us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
Cash flows from investing activities:      
Capital expenditures (303,952)us-gaap_PaymentsToAcquireProductiveAssets (168,036)us-gaap_PaymentsToAcquireProductiveAssets (157,828)us-gaap_PaymentsToAcquireProductiveAssets
Payments for business acquisitions (483,012)us-gaap_PaymentsToAcquireBusinessesGross    
Payment to Exterran Holdings for a portion of the contract operations acquisitions     (77,415)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Proceeds from sale of property, plant and equipment 6,331us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment 61,452us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment 2,465us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
(Increase) decrease in amounts due from affiliates, net 8,226us-gaap_IncreaseDecreaseInDueFromRelatedParties (10,548)us-gaap_IncreaseDecreaseInDueFromRelatedParties 3,838us-gaap_IncreaseDecreaseInDueFromRelatedParties
Net cash used in investing activities (772,407)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations (117,132)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations (228,940)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
Cash flows from financing activities:      
Proceeds from borrowings of long-term debt 927,798us-gaap_ProceedsFromIssuanceOfLongTermDebt 1,005,536us-gaap_ProceedsFromIssuanceOfLongTermDebt 714,000us-gaap_ProceedsFromIssuanceOfLongTermDebt
Repayments of long-term debt (386,500)us-gaap_RepaymentsOfLongTermDebt (928,500)us-gaap_RepaymentsOfLongTermDebt (684,350)us-gaap_RepaymentsOfLongTermDebt
Distributions to unitholders (130,345)us-gaap_DistributionMadeToLimitedPartnerCashDistributionsPaid (107,196)us-gaap_DistributionMadeToLimitedPartnerCashDistributionsPaid (87,866)us-gaap_DistributionMadeToLimitedPartnerCashDistributionsPaid
Net proceeds from issuance of common units 169,471us-gaap_ProceedsFromIssuanceOfCommonLimitedPartnersUnits   114,530us-gaap_ProceedsFromIssuanceOfCommonLimitedPartnersUnits
Net proceeds from sale of general partner units 3,573exlp_ProceedsFromIssuanceOfGeneralPartnerUnits   2,426exlp_ProceedsFromIssuanceOfGeneralPartnerUnits
Payments for debt issuance costs (6,986)us-gaap_PaymentsOfDebtIssuanceCosts (12,147)us-gaap_PaymentsOfDebtIssuanceCosts (1,011)us-gaap_PaymentsOfDebtIssuanceCosts
Payments for settlement of interest rate swaps that include financing elements (3,793)us-gaap_PaymentsForDerivativeInstrumentFinancingActivities (2,207)us-gaap_PaymentsForDerivativeInstrumentFinancingActivities  
Purchases of treasury units (312)exlp_PaymentsForRepurchaseOfCommonUnits (182)exlp_PaymentsForRepurchaseOfCommonUnits (225)exlp_PaymentsForRepurchaseOfCommonUnits
Capital contribution from limited partners and general partner 13,850us-gaap_ProceedsFromPartnershipContribution 25,180us-gaap_ProceedsFromPartnershipContribution 24,758us-gaap_ProceedsFromPartnershipContribution
Increase (decrease) in amounts due to affiliates, net   (21,598)us-gaap_IncreaseDecreaseInDueToRelatedParties 21,598us-gaap_IncreaseDecreaseInDueToRelatedParties
Net cash provided by (used in) financing activities 586,756us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations (41,114)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations 103,860us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Net increase in cash and cash equivalents 113us-gaap_NetCashProvidedByUsedInContinuingOperations 40us-gaap_NetCashProvidedByUsedInContinuingOperations 137us-gaap_NetCashProvidedByUsedInContinuingOperations
Cash and cash equivalents at beginning of period 182us-gaap_CashAndCashEquivalentsAtCarryingValue 142us-gaap_CashAndCashEquivalentsAtCarryingValue 5us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents at end of period 295us-gaap_CashAndCashEquivalentsAtCarryingValue 182us-gaap_CashAndCashEquivalentsAtCarryingValue 142us-gaap_CashAndCashEquivalentsAtCarryingValue
Supplemental disclosure of cash flow information:      
Cash paid for interest 47,446us-gaap_InterestPaid 28,359us-gaap_InterestPaid 22,566us-gaap_InterestPaid
Cash paid for taxes, net 779us-gaap_IncomeTaxesPaidNet 604us-gaap_IncomeTaxesPaidNet 785us-gaap_IncomeTaxesPaidNet
Supplemental disclosure of non-cash transactions:      
Non-cash capital contribution from limited and general partner 6,153exlp_NonCashCapitalContributionFromLimitedAndGeneralPartner 21,684exlp_NonCashCapitalContributionFromLimitedAndGeneralPartner 14,549exlp_NonCashCapitalContributionFromLimitedAndGeneralPartner
Contract operations equipment acquired/exchanged, net (11,970)us-gaap_ContributionOfProperty 146,758us-gaap_ContributionOfProperty 47,908us-gaap_ContributionOfProperty
Intangible assets allocated in contract operations acquisitions   3,131us-gaap_NoncashOrPartNoncashAcquisitionIntangibleAssetsAcquired1 5,005us-gaap_NoncashOrPartNoncashAcquisitionIntangibleAssetsAcquired1
Debt assumed in contract operations acquisitions     105,350us-gaap_NoncashOrPartNoncashAcquisitionDebtAssumed1
Non-cash capital distribution due to the contract operations acquisitions   12,350exlp_NonCashPartnersCapitalAccountAcquisitions 28,221exlp_NonCashPartnersCapitalAccountAcquisitions
Common units issued in contract operations acquisitions   170,537exlp_LimitedPartnersCapitalAccountAcquisition  
General partner units issued in contract operations acquisitions   $ 3,463exlp_GeneralPartnersCapitalAccountAcquisition