Income Taxes - Narrative (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Sep. 30, 2020 |
Sep. 30, 2019 |
Sep. 30, 2018 |
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| Income Tax Disclosure [Abstract] | |||
| Tax benefit related to TCJA | $ 9,847,000 | ||
| Effective income tax rate reconciliation, at federal statutory income tax rate, percent | 21.00% | 21.00% | 24.53% |
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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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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of income tax benefit for remeasurement of deferred tax liability from change in tax rate pursuant to Tax Cuts and Jobs Act. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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