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Impairment and Other Charges, Net - Restructuring Costs (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Apr. 12, 2020
Apr. 14, 2019
Apr. 12, 2020
Apr. 14, 2019
Restructuring Cost and Reserve [Line Items]        
Restructuring costs $ 118 $ 946 $ 1,163 $ 6,786
Employee severance and related costs        
Restructuring Cost and Reserve [Line Items]        
Restructuring costs 118 642 1,163 5,148
Strategic Alternative Evaluation        
Restructuring Cost and Reserve [Line Items]        
Restructuring costs $ 0 [1] $ 304 [1] $ 0 $ 1,638 [1]
[1] Strategic Alternative Evaluation costs primarily relate to third party advisory services.