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Nature of Operations and Summary of Significant Accounting Policies - Product Warranty (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 29, 2018
Dec. 30, 2017
Changes in the carrying amount of accrued warranty costs [Roll Forward]    
Balance at Beginning of Year $ 5,498 $ 3,843
Provision charged to expense 3,708 2,652
Usage (3,140) (2,225)
Acquisitions 0 790
Currency translation (340) 438
Balance at End of Year $ 5,726 $ 5,498