NET GAIN ON TRADING SECURITIES - Narrative (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2025 |
Sep. 30, 2024 |
Sep. 30, 2025 |
Sep. 30, 2024 |
|
| Investments, Debt and Equity Securities [Abstract] | ||||
| Net gain recognized during the period on trading securities sold during the period | $ 44,920 | $ 2,400 | $ 52,786 | $ 15,241 |
| Net unrealized (loss)/gain recognized during the reporting period on trading securities still held at the reporting date | (7,816) | 65,917 | 29,920 | 974 |
| Net gain on trading securities | $ 37,104 | $ 68,317 | $ 82,706 | $ 16,215 |
| X | ||||||||||
- Definition Amount of unrealized and realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in net income (trading). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in net income (trading). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in net income (trading). Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- References No definition available.
|