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BORROWINGS - Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - Significant Unobservable Inputs (Level 3) - Fair Value, Recurring - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Mar. 31, 2022
Debt Instrument [Line Items] |  |  |  |  |
Recurring Fair Value Measurements Reported in Consolidated Statements of Assets and Liabilities Using Significant Unobservable Inputs (Level 3) | $ 16,600 |  | $ 16,600 |  | $ 0
Long-Term Debt |  |  |  |  |
Fair Value Measurements of Borrowings Using Significant Unobservable Inputs (Level 3) Reported in Consolidated Statements of Assets and Liabilities |  |  |  |  |
Beginning balance | 0 | $ 41,900 | 0 | $ 22,400 |
Borrowings | 41,500 | 32,900 | 41,500 | 62,700 |
Repayments | (24,900) | (65,900) | (24,900) | (76,200) |
Unrealized appreciation (depreciation) | 0 | 0 | 0 | 0 |
Ending balance | $ 16,600 | $ 8,900 | $ 16,600 | $ 8,900 |

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- Definition Amount of sales of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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