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Income Taxes - Undistributed Earnings (Details) - USD ($)
$ in Thousands
Dec. 26, 2020
Dec. 28, 2019
Income Tax Contingency [Line Items]    
Repatriation of earnings of foreign subsidiaries $ 34,400  
Deferred tax liabilities on undistributed earnings 110 $ 75
Non-US    
Income Tax Contingency [Line Items]    
Repatriation of earnings of foreign subsidiaries 12,000  
United States    
Income Tax Contingency [Line Items]    
Repatriation of earnings of foreign subsidiaries $ 22,400