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INCOME TAXES (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Sep. 30, 2023
Income Tax Contingency [Line Items] |  |  |
Forecasted effective tax rate | 21.70% | 22.10% |
Revaluation of deferred tax assets and liabilities | $ (1.2) | $ (0.6) |
Actual effective tax rate | 21.30% | 21.90% |
ITC carryforward | $ 179.5 |  | $ 191.2
Effective term | 20 years |  |
Operating loss carryforward, valuation allowance | $ 0.7 |  | 0.7
State |  |  |
Income Tax Contingency [Line Items] |  |  |
Net operating loss carryforwards | $ 609.1 |  | $ 631.2
State | Minimum |  |  |
Income Tax Contingency [Line Items] |  |  |
Effective term | 7 years |  |
State | Maximum |  |  |
Income Tax Contingency [Line Items] |  |  |
Effective term | 20 years |  |

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