Income Taxes (Details) - USD ($) |
3 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
Mar. 31, 2019 |
Mar. 31, 2018 |
Dec. 31, 2017 |
Mar. 31, 2019 |
Mar. 31, 2018 |
Sep. 30, 2018 |
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| TaxRate [Line Items] | ||||||
| FederalCorporateTaxRate | 35.00% | 35.00% | ||||
| Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 24.50% | |||||
| Effective income tax rate (as a percent) | 25.90% | (176.60%) | 29.20% | 106.30% | ||
| Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount | $ 14,300,000.0 | |||||
| Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability | $ 14,900,000.0 | |||||
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- Definition BlendedCorporateTaxRate No definition available.
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- Definition DTLProvisionalCorporateRateReductionNetBenefit No definition available.
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- Definition FederalCorporateTaxRate No definition available.
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- Definition ProvisionalDiscreteNetTaxExpense No definition available.
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- Definition [Line Items] for TaxRate [Table] 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://fasb.org/us-gaap/role/ref/legacyRef
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