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

Maximum percentage of employee contribution, by the terms of the plan, that the employer may contribute to a defined contribution plan.

No definition available.

Name:	dxpe_DefinedContributionPlanMaximumAnnualMatchingContributionPerEmployeePercent
Namespace Prefix:	dxpe_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration