Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets (Details Textual)

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Goodwill and Intangible Assets (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Sep. 29, 2018
Sep. 30, 2017
Goodwill And Intangible Assets Disclosure [Abstract]        
Amortization expense of intangible assets $ 7,049 $ 2,038 $ 17,174 $ 6,386
Amortization expense for the remainder of 2018 $ 4,997   $ 4,997