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COVER - USD ($)
$ in Millions
 12 Months Ended 24 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Mar. 04, 2022
Jun. 30, 2021
Cover [Abstract]        
Document Type 10-K/A      
Document Annual Report true      
Document Period End Date Dec. 31, 2021      
Document Transition Report false      
Entity File Number 0-21513      
Entity Registrant Name DXP Enterprises, Inc.      
Entity Incorporation, State or Country Code TX      
Entity Tax Identification Number 76-0509661      
Entity Address, Address Line One 5301 Hollister      
Entity Address, City or Town Houston      
Entity Address, State or Province TX      
Entity Address, Postal Zip Code 77040      
City Area Code 713      
Local Phone Number 996-4700      
Title of 12(b) Security Common Stock par value $0.01      
Trading Symbol DXPE      
Security Exchange Name NASDAQ      
Entity Well-known Seasoned Issuer No      
Entity Voluntary Filers No      
Entity Current Reporting Status Yes      
Entity Interactive Data Current Yes      
Entity Filer Category Accelerated Filer      
Entity Small Business false      
Entity Emerging Growth Company false      
ICFR Auditor Attestation Flag true      
Entity Shell Company false      
Entity Public Float       $ 560.0
Entity Common Stock, Shares Outstanding     18,607,856  
Documents Incorporated by Reference Portions of the definitive proxy statement for our 2022 annual meeting of shareholders are incorporated by reference into Part III hereof. The 2022 proxy statement will be filed with the U.S. Securities and Exchange Commission within 120 days after the end of the fiscal year to which this report relates.      
Entity Central Index Key 0001020710      
Current Fiscal Year End Date --12-31      
Document Fiscal Year Focus 2021      
Document Fiscal Period Focus FY      
Amendment Flag false      
Auditor Name McConnell & Jones LLP Moss Adams LLP    
Auditor Location Houston, Texas Houston, Texas    
Auditor Firm ID 869 659