FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES (Details) - USD ($) $ in Thousands	3 Months Ended														12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015		Jun. 30, 2015	[1]	Mar. 31, 2015		Dec. 31, 2014	Sep. 30, 2014	[1]	Jun. 30, 2014	[1]	Mar. 31, 2014		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Proceeds on sale of investment															$ 0	$ (1,688)	$ 68
Loss on sale of investments																100
Impairment expense	$ 9,800	$ 58,900	[1]	$ 0		$ 0	[1]	$ 117,600	$ 0		$ 0		$ 0	[1]	67,663	117,569
Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value at beginning of period						$ 0							$ 1,837		0	1,837
Investment during period															0	0
Realized and unrealized gains (losses) included in other comprehensive income															0	(149)
Proceeds on sale of investment															0	(1,688)
Fair value at end of period	0							0							$ 0	0	$ 1,837
Payment for investment																$ 1,700
Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Impairment expense	$ 9,800	$ 57,800						$ 117,600
Level 3 [Member] | Maximum [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Estimated future cash flows, discount rate	11.50%	11.50%						13.50%
Level 3 [Member] | Minimum [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Estimated future cash flows, discount rate	10.00%	10.00%						10.00%

[1] During the fourth quarter of 2014, DXP finalized its purchase accounting for customer relationships for the acquisition of B27 and amortized the customer relationships on an accelerated basis. The revision increased amortization expense by $1.0 million per quarter.