RESTRUCTURING AND ASSET IMPAIRMENTS - Summary of Restructuring Charges (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments	$ 5,898		$ 192	$ 6,300	$ 553
NobelClad
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments					553
Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments	5,898			6,300
Operating Segments | NobelClad
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments	18		192	420
Operating Segments | DynaEnergetics
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments	5,880			5,880
Assets classified as held for sale	4,534			4,534
Cumulative currency translation losses	8,000
Operating Segments | Inventory Write Down | DynaEnergetics
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments	630
Operating Segments | Severance
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments	1,262			1,974
Operating Segments | Severance | NobelClad
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments	2	$ 712	65	714	300
Operating Segments | Severance | DynaEnergetics
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments	1,260			1,260
Operating Segments | Asset impairment
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments	4,620
Operating Segments | Asset impairment | NobelClad
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments	0
Operating Segments | Asset impairment | DynaEnergetics
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments	4,620
Operating Segments | (Gain on asset disposal) / Asset impairment
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments				3,984
Operating Segments | (Gain on asset disposal) / Asset impairment | NobelClad
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments		$ (519)		(636)
Operating Segments | (Gain on asset disposal) / Asset impairment | DynaEnergetics
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments				4,620
Operating Segments | Contract Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments	(4)			39
Operating Segments | Contract Termination Costs | NobelClad
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments	(4)			39
Operating Segments | Contract Termination Costs | DynaEnergetics
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments	0			0
Operating Segments | Equipment Moving Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments	7			234
Operating Segments | Equipment Moving Costs | NobelClad
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments	7		119	234	119
Operating Segments | Equipment Moving Costs | DynaEnergetics
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments	0			0
Operating Segments | Other Exit Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments	13			69
Operating Segments | Other Exit Costs | NobelClad
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments	13		$ 8	69	$ 134
Operating Segments | Other Exit Costs | DynaEnergetics
Restructuring Cost and Reserve [Line Items]
Restructuring expenses, net and asset impairments	$ 0			$ 0