RESTRUCTURING AND ASSET IMPAIRMENTS - Changes to the Restructuring Liability (Details) $ in Thousands	12 Months Ended
Dec. 31, 2019 USD ($)
Restructuring Reserve [Roll Forward]
December 31, 2018	$ 1,155
Expense	3,007
Payments	(1,525)
Currency and Other Adjustments	38
December 31, 2019	2,675
Severance
Restructuring Reserve [Roll Forward]
December 31, 2018	1,105
Expense	2,402
Payments	(1,131)
Currency and Other Adjustments	28
December 31, 2019	2,404
Contract Termination Costs
Restructuring Reserve [Roll Forward]
December 31, 2018	0
Expense	39
Payments	(39)
Currency and Other Adjustments	0
December 31, 2019	0
Equipment Moving Costs
Restructuring Reserve [Roll Forward]
December 31, 2018	8
Expense	233
Payments	(241)
Currency and Other Adjustments	0
December 31, 2019	0
Other Exit Costs
Restructuring Reserve [Roll Forward]
December 31, 2018	42
Expense	333
Payments	(114)
Currency and Other Adjustments	10
December 31, 2019	$ 271

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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Amount of increase (decrease) in the restructuring reserve related to foreign currency translation (gain) loss and other increases (decreases).

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