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INVESTMENT SECURITIES - Schedule of Maturities of Debt Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Mar. 31, 2023
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Debt Securities, Held-to-maturity, Maturity [Abstract] |  |
Amortized Cost , due within one year | $ 3,969 | $ 6,243
Estimated Fair Value, due within one year | 3,927 | 6,254
Amortized Cost, Due within years two through five years | 29,140 | 33,379
Estimated Fair Value, Due within years two through five | 27,287 | 31,055
Amortized Cost | 33,109 | 39,622
Estimated Fair Value | $ 31,214 | $ 37,309

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