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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 |

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