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Nature of Operations and Summary of Significant Accounting Policies - Warranty Obligations (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 28, 2019
Sep. 29, 2018
Changes in the carrying amount of accrued warranty costs [Roll Forward]    
Balance at Beginning of Year $ 5,726 $ 5,498
Provision charged to expense 3,332 2,584
Usage (2,778) (1,828)
Acquisition 303 0
Currency translation (175) (215)
Balance at End of Period $ 6,408 $ 6,039