Income Taxes - Principal Reasons for Differences from Federal Statutory Rate (Detail) |
12 Months Ended | |
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Sep. 30, 2022 |
Sep. 30, 2021 |
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| Effective Income Tax Rate Reconciliation, Percent [Abstract] | ||
| Federal statutory income tax rate | 21.00% | 21.00% |
| State income taxes, net of federal benefit | 3.90% | 4.30% |
| Permanent and other differences | 0.40% | 0.20% |
| Difference due to executive compensation | 1.00% | 1.10% |
| Tax return to provision adjustments | (1.30%) | (0.10%) |
| Uncertain tax position allowance | (3.00%) | 0.40% |
| Stock-based compensation | 0.10% | 1.60% |
| Effective income tax rate | 22.10% | 28.50% |
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- Definition Effective income tax rate reconciliation deductions executive compensation differences. No definition available.
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- Definition Effective income tax rate reconciliation permanent and other differences. No definition available.
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- Definition Effective income tax rate reconciliation tax return provision adjustments. 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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- References No definition available.
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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 attributable to changes in the valuation allowance for deferred tax assets. 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 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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