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GOODWILL AND OTHER INTANGIBLE ASSETS - Changes in Carrying Amount of Goodwill (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Goodwill [Roll Forward]    
Beginning balance $ 79,231 $ 79,039
Acquisition 2,701 0
Currency translation adjustments 105 (541)
Ending balance $ 82,037 $ 78,498