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GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]      
Amortization expense $ 4,161 $ 7,449 $ 6,041