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Nature of Operations and Summary of Significant Accounting Policies - Product Warranty (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Jan. 02, 2016
Changes in the carrying amount of accrued warranty costs [Roll Forward]    
Balance at Beginning of Year $ 3,670 $ 3,875
Provision charged to income 3,091 2,660
Usage (3,632) (2,559)
Acquisition 991 0
Currency translation (277) (306)
Balance at End of Year $ 3,843 $ 3,670