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INVESTMENT SECURITIES - Schedule of Maturities of Debt Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Mar. 31, 2022
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Debt Securities, Held-to-maturity, Maturity [Abstract] |  |
Amortized Cost , due within one year | $ 4,886 | $ 72,963
Estimated Fair Value, due within one year | 4,809 | 72,950
Amortized Cost, Due within one year through five years | 30,737 | 33,919
Estimated Fair Value, Due within one year through five years | 28,352 | 32,302
Amortized Cost | 35,623 | 106,882
Estimated Fair Value | $ 33,161 | $ 105,252

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