SECURITIES REPURCHASE AGREEMENT OBLIGATIONS - Narrative (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Securities Sold under Agreements to Repurchase [Abstract] | ||
| Fair value of collateral pledged under repurchase agreements | $ 1,436,271 | $ 2,753,601 |
| Interest payable accrued on securities purchased under reverse repurchase agreements | $ 4,798 | $ 11,684 |
| Repurchase agreement counterparty, weighted average maturity of agreements | 10 days | 12 days |