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Income Taxes (Details) - USD ($) $ in Thousands |  | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 01, 2018 | Mar. 31, 2019 | Sep. 30, 2018
Income Tax Contingency [Line Items] |  |  |
Federal statutory tax rate, percent |  |  | 24.50%
Tax benefit related to TCJA |  | $ 10,100 |
Deferred gain on sale |  | $ 3,704 |
Discontinued Operations, Disposed of by Sale | Accounting Standards Update 2017-05 |  |  |
Income Tax Contingency [Line Items] |  |  |
Net adjustment to retained earnings | $ 14,601 |  |

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