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EMPLOYEE BENEFIT PLANS (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
EMPLOYEE BENEFIT PLANS [Abstract] |  |  |
Rate of company matching (in hundredths) | 50.00% | 50.00% | 50.00%
Percentage of deferred salary which is matched (in hundredths) | 4.00% | 4.00% | 4.00%
Company contribution to the 401(K) plan | $ 1.9 | $ 1.5 | $ 0.5

X
- Definition Maximum percentage of employees' contribution that the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
Name: | dxpe_DefinedContributionPlanEmployerContributionMatchingPercent
Namespace Prefix: | dxpe_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum percentage of employee contribution, by the terms of the plan, that the employer may contribute to a defined contribution plan. + References No definition available. + Details
Name: | dxpe_DefinedContributionPlanMaximumAnnualMatchingContributionPerEmployeePercent
Namespace Prefix: | dxpe_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration