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Warranty Liability - Rollforward (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 26, 2020
Sep. 28, 2019
Dec. 31, 2019
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease)      
Balance as of January 1 $ 49,716 $ 46,468  
Current period expense 16,793 15,180  
Liabilities assumed due to acquisition 0 79  
Experience adjustments 1,831 1,090  
Payments (17,162) (15,937)  
Currency translation (145) (68)  
Balance at period end 51,033 46,812  
Current portion (20,763) (20,035) $ (21,054)
Long-term portion $ 30,270 $ 26,777