RESTRUCTURING - Narrative (Details) $ in Thousands	1 Months Ended		3 Months Ended					9 Months Ended
	May. 31, 2015 board_member	Jan. 31, 2015 Facility	Sep. 30, 2015 USD ($) board_member	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) board_member	Sep. 30, 2014 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges			$ 285				$ 0	$ 3,397	$ 0
Number of members of board of directors not standing for re-election | board_member	2
Number of members of board of directors | board_member	9		7					7
NobelClad | Facility closing
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges			$ 48	$ 504	$ 54	$ 6,781
DynaEnergetics
Restructuring Cost and Reserve [Line Items]
Number of distribution centers closed | Facility		2
Number of new centralized distribution centers to replace closed distribution centers | Facility		2
DynaEnergetics | Facility closing
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges			$ 237	$ 612	382
Corporate | Severance
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges					$ 1,560