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Fair Value Measurements - Schedule of Investments that Use Level 3 Inputs (Details) - Level 3 [Member] - USD ($) $ in Thousands | 3 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Schedule of Investments that Use Level 3 Inputs [Line Items] |  |
Balance at beginning | $ 140,290 | $ 165,316
Purchases and other adjustments to cost | 95,755 | 14,512
Sales (including repayments or maturities) | (16,404) | (16,654)
Net realized gains/(losses) from investments | 84 | 266
Net unrealized gains/(losses) | (748) | 479
Transfer in/(out) |  |
Balance at ending | 218,977 | 163,919
Senior Secured First Lien Term Loans [Member] |  |
Schedule of Investments that Use Level 3 Inputs [Line Items] |  |
Balance at beginning | 68,987 | 82,499
Purchases and other adjustments to cost | 26,271 | 7,760
Sales (including repayments or maturities) | (10,166) | (8,802)
Net realized gains/(losses) from investments | 84 | (12)
Net unrealized gains/(losses) | (789) | 951
Transfer in/(out) |  |
Balance at ending | 84,387 | 82,396
Senior Secured Notes [Member] |  |
Schedule of Investments that Use Level 3 Inputs [Line Items] |  |
Balance at beginning | 7,422 |
Purchases and other adjustments to cost |  |
Sales (including repayments or maturities) |  |
Net realized gains/(losses) from investments |  |
Net unrealized gains/(losses) |  |
Transfer in/(out) |  |
Balance at ending | 7,422 |
Equities/ Warrants [Member] |  |
Schedule of Investments that Use Level 3 Inputs [Line Items] |  |
Balance at beginning | 63,881 | 82,817
Purchases and other adjustments to cost | 69,484 | 6,752
Sales (including repayments or maturities) | (6,238) | (7,852)
Net realized gains/(losses) from investments |  | 278
Net unrealized gains/(losses) | 41 | (472)
Transfer in/(out) |  |
Balance at ending | $ 127,168 | $ 81,523

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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://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Amount of transfers of financial instrument classified as a liability into (out of) level 3 of the fair value hierarchy. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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