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Investments (Details) - Schedule of Portfolio Composition by Geographic Location at Fair Value - USD ($) $ in Thousands | Mar. 31, 2024 | Sep. 30, 2023
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Schedule of Portfolio Composition by Geographic Location at Fair Value [Line Items] |  |
Fair Value | $ 220,049 | $ 226,461
Percentage | 100.00% | 100.00%
Northeast [Member] |  |
Schedule of Portfolio Composition by Geographic Location at Fair Value [Line Items] |  |
Fair Value | $ 85,267 | $ 92,081
Percentage | 38.70% | 40.70%
Southeast [Member] |  |
Schedule of Portfolio Composition by Geographic Location at Fair Value [Line Items] |  |
Fair Value | $ 61,506 | $ 60,116
Percentage | 28.00% | 26.50%
Midwest [Member] |  |
Schedule of Portfolio Composition by Geographic Location at Fair Value [Line Items] |  |
Fair Value | $ 36,360 | $ 32,782
Percentage | 16.50% | 14.50%
West [Member] |  |
Schedule of Portfolio Composition by Geographic Location at Fair Value [Line Items] |  |
Fair Value | $ 19,487 | $ 25,608
Percentage | 8.90% | 11.30%
International [Member] |  |
Schedule of Portfolio Composition by Geographic Location at Fair Value [Line Items] |  |
Fair Value | $ 10,175 | $ 8,012
Percentage | 4.60% | 3.50%
Southwest [Member] |  |
Schedule of Portfolio Composition by Geographic Location at Fair Value [Line Items] |  |
Fair Value | $ 6,878 | $ 7,661
Percentage | 3.10% | 3.40%
Mid-Atlantic [Member] |  |
Schedule of Portfolio Composition by Geographic Location at Fair Value [Line Items] |  |
Fair Value | $ 376 | $ 201
Percentage | 0.20% | 0.10%

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- Definition Net fair value of all derivative instruments designated as fair value hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 5 -SubTopic 10 -Topic 815 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480463/815-10-45-5 + Details
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