INVESTMENTS - Schedule of Investment Principal Repayments (Details) - USD ($) $ in Thousands  | 
Sep. 30, 2024  | 
Mar. 31, 2024  | 
[1] | ||
|---|---|---|---|---|---|
| Investments, Debt and Equity Securities [Abstract] | |||||
| Remainder of fiscal year | $ 64,060 | ||||
| 2026 | 206,310 | ||||
| 2027 | 213,485 | ||||
| 2028 | 66,231 | ||||
| 2029 | 100,394 | ||||
| Thereafter | 0 | ||||
| Total contractual repayments | 650,480 | ||||
| Investments in equity securities | 189,667 | ||||
| Total cost basis of investments held | $ 840,147 | $ 854,290 | |||
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- Definition Principal Repayment And Maturity Of Investments, No definition available. 
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| X | ||||||||||
- Definition Principal Repayment And Maturity Of Investments, After Year Four No definition available. 
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| X | ||||||||||
- Definition Principal Repayment And Maturity Of Investments, Remainder Of Fiscal Year No definition available. 
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| X | ||||||||||
- Definition Principal Repayment And Maturity Of Investments, Year Four No definition available. 
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- Definition Principal Repayment And Maturity Of Investments, Year One No definition available. 
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| X | ||||||||||
- Definition Principal Repayment And Maturity Of Investments, Year Three No definition available. 
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| X | ||||||||||
- Definition Principal Repayment And Maturity Of Investments, Year Two No definition available. 
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| X | ||||||||||
- Definition Cost of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Cost of the investment. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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- References No definition available. 
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