Income Taxes (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Mar. 31, 2020 |
Mar. 31, 2019 |
Mar. 31, 2020 |
Mar. 31, 2019 |
Sep. 30, 2019 |
|
| Income Tax Disclosure [Abstract] | |||||
| Income tax expense (benefit) | $ (11,066) | $ (165) | $ (16,463) | $ 440 | |
| Federal statutory rate (as a percent) | 21.00% | ||||
| Unrecognized tax benefits | 10,581 | $ 10,581 | $ 15,526 | ||
| Unrecognized tax benefits that would impact effective tax rate | 8,662 | 8,662 | 11,417 | ||
| Decrease reasonably possible in next 12 months | 3,073 | 3,073 | |||
| Total penalties and interest accrued | $ 2,510 | $ 2,510 | $ 2,880 | ||
| X | ||||||||||
- Definition Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition Amount 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 Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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