Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets - Summary of Amortization Expense for Acquired Intangibles (Details)

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Intangible Assets - Summary of Amortization Expense for Acquired Intangibles (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Oct. 01, 2016
Sep. 30, 2017
Oct. 01, 2016
Goodwill and Intangible Assets Disclosure [Abstract]        
Amortization Expense $ 2,929 $ 2,595 $ 8,269 $ 8,202