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Income Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017
Income Tax Examination [Line Items] |  |  |
Deferred Tax Assets, Net of Valuation Allowance | $ 48,427 | $ 53,777 |
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions | 93 | 13 |
Reorganization Of Goodwill Excess Tax Basis | 23,050 |  |
Unrecognized Tax Benefits | 30,256 | 51,968 |
Unrecognized Tax Benefits | 26,294 | 30,256 | $ 51,968
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions | 19 | 272 |
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations | 4,074 | 3,361 |
Unrecognized tax benefits reductions rate change | 0 | 18,636 |
Operating Loss Carryforwards Attributable To Goodwill Amortization | 143,577 |  |
Increase in Unrecognized Tax Benefits is Reasonably Possible | 1,573 |  |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | 43 | 35 |
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts | 245 | 207 |
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities | 9,783 | 8,054 |
Deferred Tax Assets, Operating Loss Carryforwards | 39,045 | 46,881 |
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Other | 1,396 | 1,172 |
Deferred Tax Assets, Investments | 119 | 119 |
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost | 672 | 665 |
Deferred Tax Assets, Capital Loss Carryforwards | 74 | 94 |
Deferred Tax Assets, Other | 1,137 | 712 |
Deferred Tax Assets, Valuation Allowance | 4,044 | 4,127 |
Deferred Tax Assets, Gross | 52,471 | 57,904 |
Deferred Tax Liabilities, Property, Plant and Equipment | 840 | 1,122 |
Deferred Tax Liabilities, Goodwill and Intangible Assets | 5,978 | 5,499 |
Deferred Tax Liabilities, Other | 735 | 576 |
Deferred Tax Liabilities, Gross | 7,553 | 7,197 |
Deferred tax assets | $ 40,874 | $ 46,580 |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% | 24.53% | 35.00%
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount | $ 8,430 | $ 5,973 | $ 6,582
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount | 1,277 | 1,241 | 1,173
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount | 2,009 | 1,193 | 1,003
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount | (83) | 1,761 | 142
Operating Loss Carryforwards | 306,324 |  |
Deferred Tax Assets, Operating Loss Carryforwards, State and Local | 94,007 |  |
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount |  | 31,333 |
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount | 0 | 183 | 17
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount | (556) | (238) | (207)
Effective Income Tax Rate Reconciliation, Tax Contingency, Amount | (3,967) | (1,908) | (3,499)
Effective Income Tax Rate Reconciliation, Tax Settlement, State and Local, Amount | 0 | (1,387) | 0
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount | (447) | 0 | 0
Current Federal Tax Expense (Benefit) | (1,330) | (2,345) | (3,092)
Deferred Federal Income Tax Expense (Benefit) | 5,908 | 38,744 | 6,384
Current State and Local Tax Expense (Benefit) | 2,312 | 1,536 | 1,432
Deferred State and Local Income Tax Expense (Benefit) | (227) | 216 | 487
Provision for (benefit from) income taxes | 6,663 | $ 38,151 | $ 5,211
State and Local Jurisdiction [Member] |  |  |
Income Tax Examination [Line Items] |  |  |
Operating Loss Carryforwards Attributable To Goodwill Amortization | $ 8,722 |  |

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