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Business and Summary of Significant Accounting Policies - Warranty Liabilities (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 28, 2019
Dec. 29, 2018
Dec. 30, 2017
Warranty Liabilities [Roll Forward]      
Balance at beginning of period $ 10,389 $ 9,320 $ 8,633
Additions charged to costs and expenses for current-year sales 10,949 12,385 12,214
Deductions from reserves (11,007) (11,743) (10,752)
Change in liabilities for pre-existing warranties during the current year, including expirations 1,014 427 (775)
Balance at end of period $ 11,345 $ 10,389 $ 9,320