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INVESTMENT SECURITIES - Summary of Investment Contractual Maturity Dates (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]    
Due within one year, amortized cost $ 72,963 $ 172,747
Due within one year, estimated fair value 72,950 172,798
Die within one year through five years, amortized cost 33,919 29,398
Due within one year through five years, fair value 32,302 29,944
Amortized cost 106,882 202,145
Fair value $ 105,252 $ 202,742