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Nature of Operations and Summary of Significant Accounting Policies - Acquired Intangible Assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Jan. 02, 2016
Accounting Policies [Abstract]    
Indefinite-Lived Intangible Asset $ 8,100 $ 8,100
Definite-Lived Intangible Assets, Gross 77,052 77,052
Acquisition (Note 2) 24,691 0
Accumulated amortization (49,040) (40,908)
Currency translation (8,073) (6,212)
Definite-Lived Intangible Assets, Net 44,630 29,932
Total Intangible Assets, Net $ 52,730 $ 38,032