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v3.26.1

Borrowings - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands | Jun. 30, 2026 | Sep. 30, 2025
--- | --- | ---
Debt Instrument [Line Items] |  |
Total outstanding borrowings of unconsolidated entities | $ 1,409,132 | $ 1,029,114
Unamortized debt issuance costs | (10,888) | (6,611)
Senior Unsecured Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Senior Unsecured Revolving Credit Facility | 340,000 | 0
Senior Notes |  |
Debt Instrument [Line Items] |  |
Total outstanding borrowings of unconsolidated entities | 989,112 | 950,644
Unamortized debt issuance costs | $ (10,888) | $ (6,611)
Senior Notes | 5.875% |  |
Debt Instrument [Line Items] |  |
Stated interest rate on debt instrument | 5.875% | 5.875%
Total outstanding borrowings of unconsolidated entities | $ 0 | $ 357,255
Senior Notes | 7.250% |  |
Debt Instrument [Line Items] |  |
Stated interest rate on debt instrument | 7.25% | 7.25%
Total outstanding borrowings of unconsolidated entities | $ 350,000 | $ 350,000
Senior Notes | 7.500% |  |
Debt Instrument [Line Items] |  |
Stated interest rate on debt instrument | 7.50% | 7.50%
Total outstanding borrowings of unconsolidated entities | $ 250,000 | $ 250,000
Senior Notes | 8.000% |  |
Debt Instrument [Line Items] |  |
Stated interest rate on debt instrument | 8.00% | 8.00%
Total outstanding borrowings of unconsolidated entities | $ 400,000 | $ 0
Junior Subordinated Notes |  |
Debt Instrument [Line Items] |  |
Unamortized accretion | 20,753 | 22,303
Total outstanding borrowings of unconsolidated entities | $ 80,020 | $ 78,470

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