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INVESTMENT SECURITIES - Schedule of Maturities of Debt Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Debt Securities, Held-to-maturity, Maturity [Abstract]
Amortized Cost , due within one year	$ 155,578	$ 166,799
Estimated Fair Value, due within one year	155,945	167,328
Amortized Cost, Due within years two through five years	28,463	28,502
Estimated Fair Value, Due within years two through five	28,673	28,296
Amortized Cost	184,041	195,301
Estimated Fair Value	$ 184,618	$ 195,624

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Fair value of investment in debt security measured at amortized cost (held-to-maturity), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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