DISTRIBUTIONS TO COMMON STOCKHOLDERS - Narrative (Details) - USD ($) $ in Thousands |
12 Months Ended | ||||
|---|---|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Equity [Abstract] | |||||
| Investment company, cash distributions paid to common stockholders from ordinary income | 51.30% | 52.90% | |||
| Investment company, cash distributions paid to common stockholders from capital gains | 48.70% | 47.10% | |||
| Cash distributions to common stockholders | $ 57,200 | $ 61,000 | $ 76,100 | ||
| Undistributed ordinary income | 21,283 | 36,673 | 18,700 | ||
| Capital loss carryforwards | 17,300 | 0 | |||
| Distribution paid subsequent to fiscal year-end, classified in prior year, capital loss | $ 0 | ||||
| Distribution paid subsequent to fiscal year-end, classified in prior year, capital gains | $ 18,700 | $ 1,400 | |||
| Investment company, deemed distribution approach, notice period | 60 days | ||||