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PROPERTY AND EQUIPMENT (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2019
Property, Plant and Equipment [Line Items]      
Total cost $ 100,677 $ 90,427  
Less: accumulated depreciation (54,307) (48,055)  
Total net book value 46,370 42,372  
Depreciation $ 11,068 9,842 $ 8,434
Equipment      
Property, Plant and Equipment [Line Items]      
Useful Lives 5 years    
Total cost $ 8,795 8,788  
Furniture and fixtures      
Property, Plant and Equipment [Line Items]      
Useful Lives 5 years    
Total cost $ 21,493 20,942  
Leasehold improvements      
Property, Plant and Equipment [Line Items]      
Useful Lives 10 years    
Total cost $ 52,561 41,643  
Computers and software      
Property, Plant and Equipment [Line Items]      
Useful Lives 3 years    
Total cost $ 10,772 17,941  
Other      
Property, Plant and Equipment [Line Items]      
Total cost $ 7,056 $ 1,113