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CASH AND CASH EQUIVALENTS - Narrative (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
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Sep. 30, 2025 | Mar. 31, 2025
Cash and Cash Equivalents [Abstract] |  |
Fair value of collateral received by the company under reverse repurchase agreements | $ 107,264 | $ 82,140
Interest accrued on securities purchased under reverse repurchase agreements | $ 135 | $ 5
Resale agreement counterparty, weighted average maturity of agreements | 6 days | 1 day

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- Definition Fair value of securities received as collateral against derivative assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-7A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-12 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483466/210-20-50-3 + Details
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