EARNINGS PER SHARE DATA (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Basic [Abstract]
Weighted average shares outstanding (in shares)	17,901	17,409
Net income attributable to DXP Enterprises, Inc.	$ 4,551	$ 3,133
Convertible preferred stock dividend	23	23
Net income attributable to common shareholders	$ 4,528	$ 3,110
Per share amount (in dollars per share)	$ 0.25	$ 0.18
Diluted [Abstract]
Weighted average shares outstanding (in shares)	17,901	17,409
Assumed conversion of convertible preferred stock (in shares)	840	840
Total dilutive shares (in shares)	18,741	18,249
Net income attributable to common shareholders	$ 4,528	$ 3,110
Convertible preferred stock dividend	23	23
Net income attributable to DXP Enterprises, Inc. for diluted earnings per share	$ 4,551	$ 3,133
Per share amount (in dollars per share)	$ 0.24	$ 0.17