INVESTMENTS - Investments Classified by Contractual Maturity Date (Details) - USD ($) $ in Thousands  | 
Sep. 30, 2022  | 
Mar. 31, 2022  | 
[1] | ||
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| Investments, Debt and Equity Securities [Abstract] | |||||
| For the remaining six months ending March 31, 2023 | $ 87,050 | ||||
| 2024 | 54,268 | ||||
| 2025 | 85,834 | ||||
| 2026 | 136,369 | ||||
| 2027 | 135,295 | ||||
| Thereafter | 39,750 | ||||
| Total contractual repayments | 538,566 | ||||
| Adjustments to cost basis of debt investments | (3) | ||||
| Investments in equity securities | 164,655 | ||||
| Total cost basis of investments held as of September 30, 2022: | $ 703,218 | $ 669,248 | |||
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- Definition Principal Repayment And Maturity Of Investments, No definition available. 
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- Definition Principal Repayment And Maturity Of Investments, Adjustments to Cost Basis of Debt Investments No definition available. 
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- Definition Principal Repayment And Maturity Of Investments, After Year Four No definition available. 
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- Definition Principal Repayment And Maturity Of Investments, Remainder of Fiscal Year No definition available. 
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- 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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- Definition Principal Repayment And Maturity Of Investments, Year Three No definition available. 
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- Definition Principal Repayment And Maturity Of Investments, Year Two No definition available. 
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- 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. No definition available. 
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- Definition Cost of the investment. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- References No definition available. 
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