Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

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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