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Nature of Operations and Summary of Significant Accounting Policies - Warranty Obligations (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 27, 2020
Jun. 29, 2019
Changes in the carrying amount of accrued warranty costs [Roll Forward]    
Balance at Beginning of Year $ 6,467 $ 5,726
Provision charged to expense 2,675 2,368
Usage (2,721) (1,755)
Acquisition 0 303
Currency translation (67) 37
Balance at End of Period $ 6,354 $ 6,679