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RESTRUCTURING RELATED EXPENSES (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expenses | $ 808 | $ 2,375 |
Loss on write-off of cumulative translation adjustment | 0 | 595 |
Restructuring Reserve | 351 | 383 | $ 265
Selling, General and Administrative Expenses |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expenses | $ 800 | 2,400 |
Selling, General and Administrative Expenses | Severance and termination benefits |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring expenses |  | $ 400 |

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