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Property and Equipment Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 26, 2020
Sep. 28, 2019
Sep. 26, 2020
Sep. 28, 2019
Dec. 28, 2019
Property, Plant and Equipment [Line Items]          
Total property and equipment $ 396,268   $ 396,268   $ 332,654
Accumulated depreciation 129,108   129,108   113,102
Depreciation 5,800 $ 4,800 16,000 $ 14,300  
Buildings          
Property, Plant and Equipment [Line Items]          
Property, Plant and Equipment, Additions     16,400    
Land          
Property, Plant and Equipment [Line Items]          
Total property and equipment $ 56,103   56,103   $ 40,216
Property, Plant and Equipment, Additions     $ 7,700