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Nature of Operations and Summary of Significant Accounting Policies - Intangible Assets, Net (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jul. 01, 2017
Dec. 31, 2016
Accounting Policies [Abstract]    
Indefinite-Lived $ 8,100 $ 8,100
Definite-Lived, Gross 101,743 77,052
Acquisition 0 24,691
Accumulated amortization (52,494) (49,040)
Currency translation (5,690) (8,073)
Definite-Lived, Net 43,559 44,630
Total Intangible Assets, Net $ 51,659 $ 52,730