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Income Taxes (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Apr. 02, 2021
Apr. 03, 2020
Dec. 31, 2020
Income Tax Disclosure [Abstract]      
Effective income tax rate 13.80% 15.10%  
Income (loss) before provision for income taxes $ 24,978 $ 36,639  
Discrete tax benefits 600 $ 1,000  
Unrecognized tax benefits 5,500    
Significant change in unrecognized tax benefits is reasonably possible, amount of unrecorded benefit 3,400    
Unrecognized tax benefits that would impact effective tax rate 5,500    
Accrued payroll taxes $ 9,700   $ 9,700