INCOME TAXES - Reconciliation of Federal Statutory Tax Rate to Consolidated Effective Tax Rate (Details) |
12 Months Ended | ||
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Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2019 |
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| Income Tax Disclosure [Abstract] | |||
| Federal statutory tax rate | 21.00% | 21.00% | 21.00% |
| Effect of state income taxes, net of federal deduction | 37.50% | (1.90%) | 2.70% |
| Foreign statutory taxes compared to federal statutory rate | (18.60%) | 3.40% | (0.80%) |
| Share-based compensation | 24.50% | (1.40%) | (3.10%) |
| Termination of SERP | 28.60% | 0.00% | 0.00% |
| Tax credits | (26.60%) | 1.80% | 4.90% |
| Tax basis difference | 0.00% | 0.00% | 9.80% |
| Sale of SERP-related investments | 23.80% | 0.00% | 0.00% |
| Goodwill write-down | 0.00% | (9.40%) | (40.20%) |
| Tax rate differential on net operating loss carryback | (21.40%) | 4.20% | 0.00% |
| Other | 0.20% | (0.10%) | 3.60% |
| Effective tax rate | 69.00% | 17.60% | (2.10%) |
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- Definition Effective Income Tax Rate Reconciliation, Deductible Basis Difference, Percent No definition available.
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- Definition Effective Income Tax Rate Reconciliation, Goodwill Write-Down, Percent No definition available.
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- Definition Effective Income Tax Rate Reconciliation, Income Tax Rate Differential, Percent No definition available.
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- Definition Effective Income Tax Rate Reconciliation, Nondeductible Expense, Sale Of Supplemental Retirement Plan Related Investments, Percent No definition available.
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- Definition Effective Income Tax Rate Reconciliation, Nondeductible Expense, Termination Of Supplemental Retirement Plan, Percent No definition available.
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for share-based payment arrangement. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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