RESTRUCTURING EXPENSES - Rollforward of Restructuring Charges (Details) $ in Thousands	3 Months Ended
Mar. 31, 2021 USD ($)
Restructuring Reserve [Roll Forward]
December 31, 2020	$ 958
Net expense	127
Payments and Other Adjustments	(26)
Currency Adjustments	(42)
March 31, 2021	1,017
Severance
Restructuring Reserve [Roll Forward]
December 31, 2020	958
Net expense	116
Payments and Other Adjustments	(18)
Currency Adjustments	(42)
March 31, 2021	1,014
Other exit costs
Restructuring Reserve [Roll Forward]
December 31, 2020	0
Net expense	11
Payments and Other Adjustments	(8)
Currency Adjustments	0
March 31, 2021	$ 3

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.

+ References

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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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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