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Impairment and Other Charges, Net (Accrued Severance Costs) (Details) - Employee Severance
$ in Thousands
12 Months Ended
Sep. 29, 2019
USD ($)
Restructuring Reserve [Roll Forward]  
Balance at beginning of year $ 5,309
Interest expense 7,731
Accruals released (662)
Cash payments (10,278)
Balance at end of year $ 2,100