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BUSINESS ACQUISITIONS (Details) (USD $) | 3 Months Ended | 12 Months Ended | 0 Months Ended
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Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Jan. 02, 2014 | May 01, 2014 | Apr. 16, 2013 | May 17, 2013 | Jul. 02, 2013 | Jul. 31, 2013
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill on acquisition | $ 253,312,000 us-gaap_Goodwill |  |  |  |  |  |  |  | $ 253,312,000 us-gaap_Goodwill |  | $ 188,110,000 us-gaap_Goodwill |  | $ 145,788,000 us-gaap_Goodwill |  |  |  |  |  |
Impairment charges | 117,600,000 us-gaap_GoodwillImpairmentLoss |  | 0 us-gaap_GoodwillImpairmentLoss | [1] | 0 us-gaap_GoodwillImpairmentLoss | [1] | 0 us-gaap_GoodwillImpairmentLoss | [1] | 117,569,000 us-gaap_GoodwillImpairmentLoss |  | 0 us-gaap_GoodwillImpairmentLoss |  | 0 us-gaap_GoodwillImpairmentLoss |  |  |  |  |  |
Impairment charges deductible for tax purposes | 44,300,000 dxpe_BusinessAcquisitionImpairmentChargesExpectedTaxDeductibleAmount |  |  |  |  |  |  |  | 44,300,000 dxpe_BusinessAcquisitionImpairmentChargesExpectedTaxDeductibleAmount |  |  |  |  |  |  |  |  |  |
Goodwill deductible for tax purposes | 146,000,000 us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount |  |  |  |  |  |  |  | 146,000,000 us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount |  |  |  |  |  |  |  |  |  |
Deferred tax liability | 16,000,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent |  |  |  |  |  |  |  | 16,000,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent |  | 17,900,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent |  |  |  |  |  |  |  |
Business acquired in 2013 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales from business acquisitions |  |  |  |  |  |  |  |  | 101,100,000 us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual / us-gaap_StatementScenarioAxis = dxpe_BusinessAcquiredInYearOneMember |  |  |  |  |  |  |  |  |  |
Earnings from business acquisitions |  |  |  |  |  |  |  |  | (11,100,000)us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual / us-gaap_StatementScenarioAxis = dxpe_BusinessAcquiredInYearOneMember |  |  |  |  |  |  |  |  |  |
Impairment charges |  |  |  |  |  |  |  |  | 12,300,000 us-gaap_GoodwillImpairmentLoss / us-gaap_StatementScenarioAxis = dxpe_BusinessAcquiredInYearOneMember |  |  |  |  |  |  |  |  |  |
Business acquired in 2014 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum period of information after acquisition date for revision in estimates |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |  |  |  |  |  |
Sales from business acquisitions |  |  |  |  |  |  |  |  | 176,400,000 us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual / us-gaap_StatementScenarioAxis = dxpe_BusinessAcquiredInYearTwoMember |  |  |  |  |  |  |  |  |  |
Earnings from business acquisitions |  |  |  |  |  |  |  |  | (104,000,000)us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual / us-gaap_StatementScenarioAxis = dxpe_BusinessAcquiredInYearTwoMember |  |  |  |  |  |  |  |  |  |
Impairment charges |  |  |  |  |  |  |  |  | 105,300,000 us-gaap_GoodwillImpairmentLoss / us-gaap_StatementScenarioAxis = dxpe_BusinessAcquiredInYearTwoMember |  |  |  |  |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discount rate for valuation of acquired intangibles (in hundredths) | 10.00%us-gaap_FairValueInputsDiscountRate / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |  | 13.50%us-gaap_FairValueInputsDiscountRate / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discount rate for valuation of acquired intangibles (in hundredths) | 13.50%us-gaap_FairValueInputsDiscountRate / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |  |  | 15.90%us-gaap_FairValueInputsDiscountRate / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |  |  |  |  |
B27, LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  |  |  |  |  |  |  |  |  | 293,600,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember |  |  |  |  |
Number of shares issued on acquisition (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  | 36,000 us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember |  |  |  |  |
Goodwill on acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  | 178,300,000 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember |  |  |  |  |
Intangible assets on acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  | 81,100,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember |  |  |  |  |
Purchase price financed under common stock issued |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,000,000 us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember |  |  |  |  |
Transaction cost |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,000,000 us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember |  |  |  |  |
Nontax deductible goodwill or intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  | 154,600,000 dxpe_BusinessAcquisitionGoodwillNotExpectedTaxDeductibleAmount / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember |  |  |  |  |
Purchase price allocation [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash | 2,538,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember |  |  |  |  |  |  |  | 2,538,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember |  |  |  |  |  |  |  |  |  |
Accounts Receivable, net | 51,448,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember |  |  |  |  |  |  |  | 51,448,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember |  |  |  |  |  |  |  |  |  |
Inventory | 6,472,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember |  |  |  |  |  |  |  | 6,472,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember |  |  |  |  |  |  |  |  |  |
Property and equipment | 14,573,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember |  |  |  |  |  |  |  | 14,573,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember |  |  |  |  |  |  |  |  |  |
Goodwill and intangibles | 259,412,000 dxpe_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedGoodwillAndIntangibles / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember | [2] |  |  |  |  |  |  | 259,412,000 dxpe_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedGoodwillAndIntangibles / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember | [2] |  |  |  |  |  |  |  |  |
Other assets | 1,791,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember |  |  |  |  |  |  |  | 1,791,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember |  |  |  |  |  |  |  |  |  |
Assets acquired | 336,234,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember |  |  |  |  |  |  |  | 336,234,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember |  |  |  |  |  |  |  |  |  |
Current liabilities assumed | 26,690,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember |  |  |  |  |  |  |  | 26,690,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember |  |  |  |  |  |  |  |  |  |
Non-current liabilities assumed | 15,992,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember | [3] |  |  |  |  |  |  | 15,992,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember | [3] |  |  |  |  |  |  |  |  |
Net assets acquired | 293,552,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember |  |  |  |  |  |  |  | 293,552,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = dxpe_B27LlcMember |  |  |  |  |  |  |  |  |  |
Machinery Tooling and Supply LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 14,600,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = dxpe_MachineryToolingAndSupplyLlcMember |  |  |  |
Goodwill on acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,300,000 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = dxpe_MachineryToolingAndSupplyLlcMember |  |  |  |
Intangible assets on acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,100,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = dxpe_MachineryToolingAndSupplyLlcMember |  |  |  |
Purchase price allocation [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash | 806,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents / us-gaap_BusinessAcquisitionAxis = dxpe_MachineryToolingAndSupplyLlcMember |  |  |  |  |  |  |  | 806,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents / us-gaap_BusinessAcquisitionAxis = dxpe_MachineryToolingAndSupplyLlcMember |  |  |  |  |  |  |  |  |  |
Accounts Receivable, net | 5,656,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables / us-gaap_BusinessAcquisitionAxis = dxpe_MachineryToolingAndSupplyLlcMember |  |  |  |  |  |  |  | 5,656,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables / us-gaap_BusinessAcquisitionAxis = dxpe_MachineryToolingAndSupplyLlcMember |  |  |  |  |  |  |  |  |  |
Inventory | 2,522,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory / us-gaap_BusinessAcquisitionAxis = dxpe_MachineryToolingAndSupplyLlcMember |  |  |  |  |  |  |  | 2,522,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory / us-gaap_BusinessAcquisitionAxis = dxpe_MachineryToolingAndSupplyLlcMember |  |  |  |  |  |  |  |  |  |
Property and equipment | 557,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = dxpe_MachineryToolingAndSupplyLlcMember |  |  |  |  |  |  |  | 557,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = dxpe_MachineryToolingAndSupplyLlcMember |  |  |  |  |  |  |  |  |  |
Goodwill and intangibles | 8,405,000 dxpe_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedGoodwillAndIntangibles / us-gaap_BusinessAcquisitionAxis = dxpe_MachineryToolingAndSupplyLlcMember | [2] |  |  |  |  |  |  | 8,405,000 dxpe_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedGoodwillAndIntangibles / us-gaap_BusinessAcquisitionAxis = dxpe_MachineryToolingAndSupplyLlcMember | [2] |  |  |  |  |  |  |  |  |
Other assets | 59,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets / us-gaap_BusinessAcquisitionAxis = dxpe_MachineryToolingAndSupplyLlcMember |  |  |  |  |  |  |  | 59,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets / us-gaap_BusinessAcquisitionAxis = dxpe_MachineryToolingAndSupplyLlcMember |  |  |  |  |  |  |  |  |  |
Assets acquired | 18,005,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets / us-gaap_BusinessAcquisitionAxis = dxpe_MachineryToolingAndSupplyLlcMember |  |  |  |  |  |  |  | 18,005,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets / us-gaap_BusinessAcquisitionAxis = dxpe_MachineryToolingAndSupplyLlcMember |  |  |  |  |  |  |  |  |  |
Current liabilities assumed | 3,336,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = dxpe_MachineryToolingAndSupplyLlcMember |  |  |  |  |  |  |  | 3,336,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = dxpe_MachineryToolingAndSupplyLlcMember |  |  |  |  |  |  |  |  |  |
Non-current liabilities assumed | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities / us-gaap_BusinessAcquisitionAxis = dxpe_MachineryToolingAndSupplyLlcMember | [3] |  |  |  |  |  |  | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities / us-gaap_BusinessAcquisitionAxis = dxpe_MachineryToolingAndSupplyLlcMember | [3] |  |  |  |  |  |  |  |  |
Net assets acquired | 14,669,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = dxpe_MachineryToolingAndSupplyLlcMember |  |  |  |  |  |  |  | 14,669,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = dxpe_MachineryToolingAndSupplyLlcMember |  |  |  |  |  |  |  |  |  |
NatPro [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 40,100,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |
Borrowings under existing credit facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 36,600,000 us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |
Number of shares issued on acquisition (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 52,542 us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |
Earn-out amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,000,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |
Fair value of earn-out recorded at acquisition date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,800,000 us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeFairValue1 / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |
Earn-out liability |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_BusinessCombinationLiabilitiesArisingFromContingenciesAmountRecognized / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |  |  |  |  |  |
Reduction in selling, general and administrative expense |  |  |  |  |  |  |  |  |  |  | 2,800,000 dxpe_ReductionInSellingGeneralAndAdministrativeExpense / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |  |  |  |  |  |
Goodwill on acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 24,600,000 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |
Intangible assets on acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 14,800,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |
Purchase price allocation [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |  |  |  |  |  | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |  |  |  |  |  |  |  |
Accounts Receivable, net | 14,549,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |  |  |  |  |  | 14,549,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |  |  |  |  |  |  |  |
Inventory | 6,883,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |  |  |  |  |  | 6,883,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |  |  |  |  |  |  |  |
Property and equipment | 3,317,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |  |  |  |  |  | 3,317,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |  |  |  |  |  |  |  |
Goodwill and intangibles | 39,345,000 dxpe_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedGoodwillAndIntangibles / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember | [2] |  |  |  |  |  |  | 39,345,000 dxpe_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedGoodwillAndIntangibles / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember | [2] |  |  |  |  |  |  |  |  |
Other assets | 698,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |  |  |  |  |  | 698,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |  |  |  |  |  |  |  |
Assets acquired | 64,972,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |  |  |  |  |  | 64,972,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |  |  |  |  |  |  |  |
Current liabilities assumed | 19,175,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |  |  |  |  |  | 19,175,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |  |  |  |  |  |  |  |
Non-current liabilities assumed | 5,649,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember | [3] |  |  |  |  |  |  | 5,649,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember | [3] |  |  |  |  |  |  |  |  |
Net assets acquired | 39,968,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |  |  |  |  |  | 39,968,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = dxpe_NationalProcessEquipmentIncMember |  |  |  |  |  |  |  |  |  |
Tucker Tool Company, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,000,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = dxpe_TuckerToolCompanyIncMember |  |
Goodwill on acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,200,000 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = dxpe_TuckerToolCompanyIncMember |  |
Intangible assets on acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,500,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = dxpe_TuckerToolCompanyIncMember |  |
Purchase price allocation [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents / us-gaap_BusinessAcquisitionAxis = dxpe_TuckerToolCompanyIncMember |  |  |  |  |  |  |  |
Accounts Receivable, net |  |  |  |  |  |  |  |  |  |  | 505,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables / us-gaap_BusinessAcquisitionAxis = dxpe_TuckerToolCompanyIncMember |  |  |  |  |  |  |  |
Inventory |  |  |  |  |  |  |  |  |  |  | 209,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory / us-gaap_BusinessAcquisitionAxis = dxpe_TuckerToolCompanyIncMember |  |  |  |  |  |  |  |
Property and equipment |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = dxpe_TuckerToolCompanyIncMember |  |  |  |  |  |  |  |
Goodwill and intangibles |  |  |  |  |  |  |  |  |  |  | 4,678,000 dxpe_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedGoodwillAndIntangibles / us-gaap_BusinessAcquisitionAxis = dxpe_TuckerToolCompanyIncMember | [2] |  |  |  |  |  |  |
Other assets |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets / us-gaap_BusinessAcquisitionAxis = dxpe_TuckerToolCompanyIncMember |  |  |  |  |  |  |  |
Assets acquired |  |  |  |  |  |  |  |  |  |  | 5,392,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets / us-gaap_BusinessAcquisitionAxis = dxpe_TuckerToolCompanyIncMember |  |  |  |  |  |  |  |
Current liabilities assumed |  |  |  |  |  |  |  |  |  |  | 391,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = dxpe_TuckerToolCompanyIncMember |  |  |  |  |  |  |  |
Non-current liabilities assumed |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities / us-gaap_BusinessAcquisitionAxis = dxpe_TuckerToolCompanyIncMember | [3] |  |  |  |  |  |  |
Net assets acquired |  |  |  |  |  |  |  |  |  |  | 5,001,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = dxpe_TuckerToolCompanyIncMember |  |  |  |  |  |  |  |
Alaska Pump and Supply, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13,000,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = dxpe_AlaskaPumpAndSupplyIncMember |
Goodwill on acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,100,000 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = dxpe_AlaskaPumpAndSupplyIncMember |
Intangible assets on acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,100,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = dxpe_AlaskaPumpAndSupplyIncMember |
Purchase price allocation [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents / us-gaap_BusinessAcquisitionAxis = dxpe_AlaskaPumpAndSupplyIncMember |  |  |  |  |  |  |  |
Accounts Receivable, net |  |  |  |  |  |  |  |  |  |  | 1,424,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables / us-gaap_BusinessAcquisitionAxis = dxpe_AlaskaPumpAndSupplyIncMember |  |  |  |  |  |  |  |
Inventory |  |  |  |  |  |  |  |  |  |  | 1,332,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory / us-gaap_BusinessAcquisitionAxis = dxpe_AlaskaPumpAndSupplyIncMember |  |  |  |  |  |  |  |
Property and equipment |  |  |  |  |  |  |  |  |  |  | 172,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = dxpe_AlaskaPumpAndSupplyIncMember |  |  |  |  |  |  |  |
Goodwill and intangibles |  |  |  |  |  |  |  |  |  |  | 12,241,000 dxpe_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedGoodwillAndIntangibles / us-gaap_BusinessAcquisitionAxis = dxpe_AlaskaPumpAndSupplyIncMember | [2] |  |  |  |  |  |  |
Other assets |  |  |  |  |  |  |  |  |  |  | 389,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets / us-gaap_BusinessAcquisitionAxis = dxpe_AlaskaPumpAndSupplyIncMember |  |  |  |  |  |  |  |
Assets acquired |  |  |  |  |  |  |  |  |  |  | 15,558,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets / us-gaap_BusinessAcquisitionAxis = dxpe_AlaskaPumpAndSupplyIncMember |  |  |  |  |  |  |  |
Current liabilities assumed |  |  |  |  |  |  |  |  |  |  | 1,079,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = dxpe_AlaskaPumpAndSupplyIncMember |  |  |  |  |  |  |  |
Non-current liabilities assumed |  |  |  |  |  |  |  |  |  |  | 1,419,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities / us-gaap_BusinessAcquisitionAxis = dxpe_AlaskaPumpAndSupplyIncMember | [3] |  |  |  |  |  |  |
Net assets acquired |  |  |  |  |  |  |  |  |  |  | 13,060,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = dxpe_AlaskaPumpAndSupplyIncMember |  |  |  |  |  |  |  |
Tool Tech Industrial Machine and Supply, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,200,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = dxpe_ToolTechIndustrialMachineAndSupplyIncMember
Goodwill on acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,100,000 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = dxpe_ToolTechIndustrialMachineAndSupplyIncMember
Intangible assets on acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,400,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = dxpe_ToolTechIndustrialMachineAndSupplyIncMember
Purchase price allocation [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash |  |  |  |  |  |  |  |  |  |  | 430,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents / us-gaap_BusinessAcquisitionAxis = dxpe_ToolTechIndustrialMachineAndSupplyIncMember |  |  |  |  |  |  |  |
Accounts Receivable, net |  |  |  |  |  |  |  |  |  |  | 1,505,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables / us-gaap_BusinessAcquisitionAxis = dxpe_ToolTechIndustrialMachineAndSupplyIncMember |  |  |  |  |  |  |  |
Inventory |  |  |  |  |  |  |  |  |  |  | 409,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory / us-gaap_BusinessAcquisitionAxis = dxpe_ToolTechIndustrialMachineAndSupplyIncMember |  |  |  |  |  |  |  |
Property and equipment |  |  |  |  |  |  |  |  |  |  | 19,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = dxpe_ToolTechIndustrialMachineAndSupplyIncMember |  |  |  |  |  |  |  |
Goodwill and intangibles |  |  |  |  |  |  |  |  |  |  | 7,254,000 dxpe_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedGoodwillAndIntangibles / us-gaap_BusinessAcquisitionAxis = dxpe_ToolTechIndustrialMachineAndSupplyIncMember | [2] |  |  |  |  |  |  |
Other assets |  |  |  |  |  |  |  |  |  |  | 2,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets / us-gaap_BusinessAcquisitionAxis = dxpe_ToolTechIndustrialMachineAndSupplyIncMember |  |  |  |  |  |  |  |
Assets acquired |  |  |  |  |  |  |  |  |  |  | 9,619,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets / us-gaap_BusinessAcquisitionAxis = dxpe_ToolTechIndustrialMachineAndSupplyIncMember |  |  |  |  |  |  |  |
Current liabilities assumed |  |  |  |  |  |  |  |  |  |  | 1,987,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = dxpe_ToolTechIndustrialMachineAndSupplyIncMember |  |  |  |  |  |  |  |
Non-current liabilities assumed |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities / us-gaap_BusinessAcquisitionAxis = dxpe_ToolTechIndustrialMachineAndSupplyIncMember | [3] |  |  |  |  |  |  |
Net assets acquired |  |  |  |  |  |  |  |  |  |  | 7,632,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = dxpe_ToolTechIndustrialMachineAndSupplyIncMember |  |  |  |  |  |  |  |
Units Acquired in 2013 and 2014 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pro Forma Information [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 1,513,000,000 us-gaap_BusinessAcquisitionsProFormaRevenue / us-gaap_BusinessAcquisitionAxis = dxpe_UnitsAcquiredIn2013And2014Member |  | 1,496,000,000 us-gaap_BusinessAcquisitionsProFormaRevenue / us-gaap_BusinessAcquisitionAxis = dxpe_UnitsAcquiredIn2013And2014Member |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  |  |  |  |  | (45,000,000)us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss / us-gaap_BusinessAcquisitionAxis = dxpe_UnitsAcquiredIn2013And2014Member |  | 71,000,000 us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss / us-gaap_BusinessAcquisitionAxis = dxpe_UnitsAcquiredIn2013And2014Member |  |  |  |  |  |  |  |
Per share data [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic earnings (loss) (in dollars per share) |  |  |  |  |  |  |  |  | $ (3.08)us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic / us-gaap_BusinessAcquisitionAxis = dxpe_UnitsAcquiredIn2013And2014Member |  | $ 4.90 us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic / us-gaap_BusinessAcquisitionAxis = dxpe_UnitsAcquiredIn2013And2014Member |  |  |  |  |  |  |  |
Diluted earnings (loss) (in dollars per share) |  |  |  |  |  |  |  |  | $ (3.08)us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted / us-gaap_BusinessAcquisitionAxis = dxpe_UnitsAcquiredIn2013And2014Member |  | $ 4.64 us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted / us-gaap_BusinessAcquisitionAxis = dxpe_UnitsAcquiredIn2013And2014Member |  |  |  |  |  |  |  |
Units Acquired in 2012 and 2013 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pro Forma Information [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  | 1,284,000,000 us-gaap_BusinessAcquisitionsProFormaRevenue / us-gaap_BusinessAcquisitionAxis = dxpe_UnitsAcquiredIn2012And2013Member |  | 1,280,000,000 us-gaap_BusinessAcquisitionsProFormaRevenue / us-gaap_BusinessAcquisitionAxis = dxpe_UnitsAcquiredIn2012And2013Member |  |  |  |  |  |
Net income (loss) |  |  |  |  |  |  |  |  |  |  | $ 62,000,000 us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss / us-gaap_BusinessAcquisitionAxis = dxpe_UnitsAcquiredIn2012And2013Member |  | $ 55,000,000 us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss / us-gaap_BusinessAcquisitionAxis = dxpe_UnitsAcquiredIn2012And2013Member |  |  |  |  |  |
Per share data [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic earnings (loss) (in dollars per share) |  |  |  |  |  |  |  |  |  |  | $ 4.28 us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic / us-gaap_BusinessAcquisitionAxis = dxpe_UnitsAcquiredIn2012And2013Member |  | $ 3.83 us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic / us-gaap_BusinessAcquisitionAxis = dxpe_UnitsAcquiredIn2012And2013Member |  |  |  |  |  |
Diluted earnings (loss) (in dollars per share) |  |  |  |  |  |  |  |  |  |  | $ 4.05 us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted / us-gaap_BusinessAcquisitionAxis = dxpe_UnitsAcquiredIn2012And2013Member |  | $ 3.62 us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted / us-gaap_BusinessAcquisitionAxis = dxpe_UnitsAcquiredIn2012And2013Member |  |  |  |  |  |
[1] | During the fourth quarter of 2014, DXP finalized its purchase accounting for customer relationships for the acquisition of B27 and amortized the customer relationships on an accelerated basis. The revision increased amortization expense by $1.0 million per quarter.
[2] | The amounts in the table above do not reflect the $117.6 million of goodwill impairment charges recorded in the fourth quarter of 2014. Approximately $44.3 million, of the impairment charges are deductible for tax purposes. The remaining goodwill deductible for tax purposes was $146.0 million at December 31, 2014.
[3] | Includes deferred tax liability of $16.0 million and $17.9 million related to intangible assets acquired for 2014 and 2013, respectively.

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