NET GAIN ON TRADING SECURITIES - Summary of net gain on trading securities (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Investments, Debt and Equity Securities [Abstract] | ||||
| Debt Securities, Trading, Realized Gain (Loss) | $ 39,658 | $ 11,462 | $ 189,193 | $ 28,635 |
| Debt Securities, Trading, Unrealized Gain (Loss) | (39,255) | 7,482 | (3,639) | 7,695 |
| Debt Securities, Trading, Gain (Loss), Total | $ 403 | $ 18,944 | $ 185,554 | $ 36,330 |
| 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/2003/role/disclosureRef
|
| 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/2009/role/commonPracticeRef
|
| X | ||||||||||
- References No definition available.
|