EARNINGS PER SHARE DATA (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Basic [Abstract]
Weighted average shares outstanding (in shares)	17,558	17,404	17,538	17,406
Net income attributable to DXP Enterprises, Inc.	$ 11,562	$ 4,135	$ 16,113	$ 7,268
Convertible preferred stock dividend	22	22	45	45
Net income attributable to common shareholders	$ 11,540	$ 4,113	$ 16,068	$ 7,223
Per share amount (in dollars per share)	$ 0.66	$ 0.24	$ 0.92	$ 0.42
Diluted [Abstract]
Weighted average shares outstanding (in shares)	17,558	17,404	17,538	17,406
Assumed conversion of convertible preferred stock (in shares)	840	840	840	840
Total dilutive shares (in shares)	18,398	18,244	18,378	18,246
Net income attributable to common shareholders	$ 11,540	$ 4,113	$ 16,068	$ 7,223
Convertible preferred stock dividend	22	22	45	45
Net income attributable to DXP Enterprises, Inc. for diluted earnings per share	$ 11,562	$ 4,135	$ 16,113	$ 7,268
Per share amount (in dollars per share)	$ 0.63	$ 0.23	$ 0.88	$ 0.40