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Other Expense, Net (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 02, 2021
Sep. 26, 2020
Oct. 02, 2021
Sep. 26, 2020
Other Income And Expenses [Line Items]        
Impairment of long-lived assets $ 0 $ 0 $ 2,962 $ 0
Employee termination costs (recovery) $ 499 54 1,660 247
Reversal of previously recognized stock-based compensation expense related to forfeited awards       900
Loss on settlement of employment-related legal matter     500  
Loss on settlement of customer-related legal matter   2,400   2,400
Cash settlement payment   4,400   4,400
Gain on settlement of unrelated legal matter   1,700   1,700
Value Creation Plan [Member]        
Other Income And Expenses [Line Items]        
Employee termination costs (recovery)   $ 100   $ 1,100
Closure Of South Gate Facility [Member]        
Other Income And Expenses [Line Items]        
Employee termination costs (recovery)     $ 1,200