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INTANGIBLE ASSETS AND GOODWILL - Changes in Carrying Amount of Goodwill by Location (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Goodwill [Roll Forward]    
Goodwill, beginning balance $ 128,300 $ 39,694
Additions due to acquisitions   91,060
Foreign currency translation 3,220 (2,454)
Goodwill, ending balance $ 131,520 $ 128,300