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INVESTMENT SECURITIES - Schedule of Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value of Securities Held to Maturity (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Mar. 31, 2025
--- | --- | ---
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | $ 184,064 | $ 195,301
Gross Unrealized Gains | 722 | 644
Gross Unrealized (Losses) | (144) | (321)
Fair Value | 184,642 | 195,624
Corporate debt securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 160,466 | 177,687
Gross Unrealized Gains | 578 | 627
Gross Unrealized (Losses) | (63) | (164)
Fair Value | 160,981 | 178,150
U.S. treasury securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 23,220 | 17,044
Gross Unrealized Gains | 144 | 17
Gross Unrealized (Losses) | (81) | (157)
Fair Value | 23,283 | 16,904
Common stock |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 24 | 21
Gross Unrealized Gains | 0 | 0
Gross Unrealized (Losses) | 0 | 0
Fair Value | 24 | 21
Certificates of deposit |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 354 | 549
Gross Unrealized Gains | 0 | 0
Gross Unrealized (Losses) | 0 | 0
Fair Value | $ 354 | $ 549

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