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OTHER COMPREHENSIVE INCOME (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) entity	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Equity [Abstract]
Number of companies that operate in Canada | entity	4
Cumulative translation adjustments, net of tax | $	$ 1,941	$ (687)	$ 224

X

- Definition

Refers to acquired companies that operate in Canada.

+ References

No definition available.

+ Details

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Namespace Prefix:	dxpe_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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Period Type:	duration

X

- Definition

Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580

+ Details

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