Note 7 - Leases - Additional Information (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Operating cash flows from operating leases | $ 11,789 | $ 11,529 | $ 34,848 | $ 34,411 |
| Operating leases (Year) | 9 years 2 months 12 days | 9 years 4 months 24 days | 9 years 2 months 12 days | 9 years 4 months 24 days |
| Finance leases (Year) | 15 years 1 month 6 days | 14 years | 15 years 1 month 6 days | 14 years |
| Operating cash flows from finance leases | $ 544 | $ 533 | $ 1,672 | $ 1,605 |
| Operating leases | 4.40% | 4.20% | 4.40% | 4.20% |
| Finance leases | 4.90% | 4.90% | 4.90% | 4.90% |
| Financing cash flows from finance leases | $ 982 | $ 980 | $ 2,801 | $ 2,931 |
| Operating leases | 7,133 | 5,740 | 18,386 | 14,022 |
| Finance leases | $ 0 | $ 3,135 | $ (32) | $ 3,135 |
| X | ||||||||||
- Definition Amount of financing cash inflow (outflow) from finance leases. No definition available.
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| X | ||||||||||
- Definition Amount of operating cash inflow (outflow) from finance leases. No definition available.
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| X | ||||||||||
- Definition Amount of operating cash inflow (outflow) from operating leases No definition available.
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| X | ||||||||||
- Definition Amount of increase (decrease) in right-of-use asset obtained in exchange for finance lease liability. No definition available.
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| X | ||||||||||
- Definition Weighted average discount rate for finance lease calculated at point in time. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Weighted average discount rate for operating lease calculated at point in time. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of increase in right-of-use asset obtained in exchange for operating lease liability. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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