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BORROWINGS - Schedule of Borrowings Outstanding (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Mar. 31, 2022
--- | --- | ---
Debt Instrument [Line Items] |  |
Outstanding Balance | $ 619,000 | $ 535,000
Unamortized Debt Issuance Costs and Debt Discount/Premium | (7,373) | (6,412)
Recorded Value | 611,627 | 528,588
Line of Credit | Credit Facility |  |
Debt Instrument [Line Items] |  |
Outstanding Balance | 225,000 |
Unamortized Debt Issuance Costs and Debt Discount/Premium | 0 |
Recorded Value | 225,000 |
SBA Debentures | Unsecured Debt |  |
Debt Instrument [Line Items] |  |
Outstanding Balance | 104,000 | 40,000
Unamortized Debt Issuance Costs and Debt Discount/Premium | (3,418) | (1,648)
Recorded Value | 100,582 | 38,352
Credit Facility | Line of Credit |  |
Debt Instrument [Line Items] |  |
Outstanding Balance |  | 205,000
Unamortized Debt Issuance Costs and Debt Discount/Premium |  | 0
Recorded Value |  | 205,000
January 2026 Notes | Notes |  |
Debt Instrument [Line Items] |  |
Outstanding Balance | 140,000 | 140,000
Unamortized Debt Issuance Costs and Debt Discount/Premium | (1,033) | (1,286)
Recorded Value | 138,967 | 138,714
October 2026 Notes | Notes |  |
Debt Instrument [Line Items] |  |
Outstanding Balance | 150,000 | 150,000
Unamortized Debt Issuance Costs and Debt Discount/Premium | (2,922) | (3,478)
Recorded Value | $ 147,078 | $ 146,522

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