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LEASES - Additional Information (Details)
 1 Months Ended 12 Months Ended
Mar. 31, 2010
USD ($)
location
Mar. 31, 2021
USD ($)
Mar. 31, 2020
USD ($)
Mar. 31, 2019
USD ($)
Rent expense       $ 2,000,000
Operating lease   $ 1,500,000 $ 1,700,000  
Operating lease right of use assets in exchange for operating lease liabilities   6,100,000 5,600,000  
Number of branches sold | location 2      
Deferred gain on sale $ 2,100,000      
Accrued expenses and other liabilities        
Deferred gain on sale   $ 377,000 $ 537,000