EARNINGS PER SHARE DATA - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Basic earnings per share:
Weighted average shares outstanding (in shares)	16,870	18,631	18,949
Net income attributable to DXP Enterprises, Inc.	$ 68,812	$ 48,155	$ 16,496
Series B convertible preferred stock dividend	(90)	(90)	(90)
Net income attributable to common shareholders	$ 68,722	$ 48,065	$ 16,406
Per share amount (in dollars per share)	$ 4.07	$ 2.58	$ 0.87
Diluted earnings per share:
Weighted average shares outstanding (in shares)	16,870	18,631	18,949
Assumed conversion of convertible preferred stock (in shares)	840	840	840
Total dilutive shares (in shares)	17,710	19,471	19,789
Net income attributable to common shareholders	$ 68,722	$ 48,065	$ 16,406
Series B convertible preferred stock dividend	90	90	90
Net income attributable to DXP Enterprises, Inc.	$ 68,812	$ 48,155	$ 16,496
Per share amount (in dollars per share)	$ 3.89	$ 2.47	$ 0.83