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INVESTMENT SECURITIES | 12 Months Ended
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Mar. 31, 2022
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:
| March 31, 2022
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized (Losses) |  | Fair Value (1)
Corporate debt securities | $ | 88,475 |  |  | $ | 2 |  |  | $ | (1,403) |  |  | $ | 87,074 |
U.S. treasury securities | 17,891 |  |  | — |  |  | (229) |  |  | 17,662 |
Certificates of deposit | 516 |  |  | — |  |  | — |  |  | 516 |
Total securities with unrealized gains/(losses) | $ | 106,882 |  |  | $ | 2 |  |  | $ | (1,632) |  |  | $ | 105,252 |
(1)Included within Investment securities in the Consolidated Balance Sheets.
| March 31, 2021
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized (Losses) |  | Fair Value
Corporate debt securities | $ | 178,384 |  |  | $ | 389 |  |  | $ | (114) |  |  | $ | 178,659 |
U.S. treasury securities | 23,761 |  |  | 322 |  |  | — |  |  | 24,083 |
Total securities with unrealized gains/(losses) | $ | 202,145 |  |  | $ | 711 |  |  | $ | (114) |  |  | $ | 202,742 |
(1)Included within Investment securities in the Consolidated Balance Sheets. Scheduled maturities of the debt securities held by the Company included within the investment securities portfolio were as follows:
| March 31, 2022 |  | March 31, 2021
| Amortized Cost |  | Estimated Fair Value |  | Amortized Cost |  | Estimated Fair Value
Due within one year | $ | 72,963 |  |  | $ | 72,950 |  |  | $ | 172,747 |  |  | $ | 172,798 |
Due within years two through five | 33,919 |  |  | 32,302 |  |  | 29,398 |  |  | 29,944 |
Total debt within the investment securities portfolio | $ | 106,882 |  |  | $ | 105,252 |  |  | $ | 202,145 |  |  | $ | 202,742 |

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI https://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI https://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI https://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI https://asc.fasb.org/subtopic&trid=2176304 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1403 -Paragraph (b) + Details
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