v3.25.4

BORROWINGS - Borrowings Outstanding (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Mar. 31, 2025
--- | --- | ---
Debt Instrument [Line Items] |  |
Outstanding Balance | $ 1,089,000 | $ 969,875
Unamortized Debt Issuance Costs and Debt Discount/Premium | (16,518) | (13,810)
Recorded Value | 1,072,482 | 956,065
Estimated Fair Value | 1,069,479 | 939,710
SBA Debentures |  |
Debt Instrument [Line Items] |  |
Unamortized Debt Issuance Costs and Debt Discount/Premium | (4,375) | (4,082)
SBA Debentures | Unsecured Debt |  |
Debt Instrument [Line Items] |  |
Outstanding Balance | 195,000 | 175,000
Unamortized Debt Issuance Costs and Debt Discount/Premium | (4,375) | (4,082)
Recorded Value | 190,625 | 170,918
Estimated Fair Value | 188,029 | 166,460
Corporate Credit Facility | Line of Credit | Corporate Credit Facility |  |
Debt Instrument [Line Items] |  |
Outstanding Balance | 210,000 | 235,000
Unamortized Debt Issuance Costs and Debt Discount/Premium | 0 | 0
Recorded Value | 210,000 | 235,000
Estimated Fair Value | 210,000 | 235,000
SPV Credit Facility | Line of Credit | SPV Credit Facility |  |
Debt Instrument [Line Items] |  |
Outstanding Balance | 104,000 | 108,000
Unamortized Debt Issuance Costs and Debt Discount/Premium | 0 | 0
Recorded Value | 104,000 | 108,000
Estimated Fair Value | 104,000 | 108,000
October 2026 Notes |  |
Debt Instrument [Line Items] |  |
Unamortized Debt Issuance Costs and Debt Discount/Premium | 0 | (1,154)
October 2026 Notes | Notes |  |
Debt Instrument [Line Items] |  |
Outstanding Balance |  | 150,000
Unamortized Debt Issuance Costs and Debt Discount/Premium |  | (1,154)
Recorded Value |  | 148,846
Estimated Fair Value |  | 130,899
August 2028 Notes |  |
Debt Instrument [Line Items] |  |
Unamortized Debt Issuance Costs and Debt Discount/Premium | 0 | (1,681)
August 2028 Notes | Notes |  |
Debt Instrument [Line Items] |  |
Outstanding Balance |  | 71,875
Unamortized Debt Issuance Costs and Debt Discount/Premium |  | (1,681)
Recorded Value |  | 70,194
Estimated Fair Value |  | 73,571
2029 Convertible Notes |  |
Debt Instrument [Line Items] |  |
Unamortized Debt Issuance Costs and Debt Discount/Premium | (5,783) | (6,893)
2029 Convertible Notes | Convertible Debt |  |
Debt Instrument [Line Items] |  |
Outstanding Balance | 230,000 | 230,000
Unamortized Debt Issuance Costs and Debt Discount/Premium | (5,783) | (6,893)
Recorded Value | 224,217 | 223,107
Estimated Fair Value | 220,594 | 225,780
September 2030 Notes |  |
Debt Instrument [Line Items] |  |
Unamortized Debt Issuance Costs and Debt Discount/Premium | (6,360) | $ 0
September 2030 Notes | Notes |  |
Debt Instrument [Line Items] |  |
Outstanding Balance | 350,000 |
Unamortized Debt Issuance Costs and Debt Discount/Premium | (6,360) |
Recorded Value | 343,640 |
Estimated Fair Value | $ 346,856 |

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