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INVESTMENT SECURITIES | 6 Months Ended
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Sep. 30, 2025
Investments, Debt and Equity Securities [Abstract] |
INVESTMENT SECURITIES | Investment Securities The amortized cost and gross unrealized gains (losses) of marketable investment securities accounted under the fair value method were as follows:
| September 30, 2025
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized (Losses) |  | Fair Value
Corporate debt securities | $ | 160,466 |  |  | $ | 578 |  |  | $ | (63) |  |  | $ | 160,981 |
U.S. treasury securities | 23,220 |  |  | 144 |  |  | (81) |  |  | 23,283 |
Common stock | 24 |  |  | — |  |  | — |  |  | 24 |
Certificates of deposit | 354 |  |  | — |  |  | — |  |  | 354 |
Total securities with unrealized gains/(losses) | $ | 184,064 |  |  | $ | 722 |  |  | $ | (144) |  |  | $ | 184,642 |
| March 31, 2025
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized (Losses) |  | Fair Value
Corporate debt securities | $ | 177,687 |  |  | $ | 627 |  |  | $ | (164) |  |  | $ | 178,150 |
U.S. treasury securities | 17,044 |  |  | 17 |  |  | (157) |  |  | 16,904 |
Common stock | 21 |  |  | — |  |  | — |  |  | 21 |
Certificates of deposit | 549 |  |  | — |  |  | — |  |  | 549 |
Total securities with unrealized gains/(losses) | $ | 195,301 |  |  | $ | 644 |  |  | $ | (321) |  |  | $ | 195,624 |
Scheduled maturities of the debt securities held by the Company included within the investment securities portfolio were as follows:
| September 30, 2025 |  | March 31, 2025
| Amortized Cost |  | Estimated Fair Value |  | Amortized Cost |  | Estimated Fair Value
Due within one year | $ | 155,578 |  |  | $ | 155,945 |  |  | $ | 166,799 |  |  | $ | 167,328 |
Due within years two through five | 28,463 |  |  | 28,673 |  |  | 28,502 |  |  | 28,296 |
Total debt within the investment securities portfolio | $ | 184,041 |  |  | $ | 184,618 |  |  | $ | 195,301 |  |  | $ | 195,624 |

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