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Revenues - Sales by Sales Channel (Details) - USD ($)
$ in Thousands
3 Months Ended
Apr. 03, 2020
Mar. 29, 2019
Disaggregation of Revenue [Line Items]    
Total sales $ 184,361 $ 161,700
OEM    
Disaggregation of Revenue [Line Items]    
Total sales 103,748 100,505
Aftermarket    
Disaggregation of Revenue [Line Items]    
Total sales $ 80,613 $ 61,195