Estimated Amortization Expense (Details) - USD ($) $ in Thousands	Sep. 28, 2018	Dec. 31, 2017
Finite Lived Intangible Assets [Line Items]
2018 (remainder of year)	$ 6,600
2019	24,201
2020	20,940
2021	19,090
2022	16,118
Thereafter	50,672
Amortizable intangible assets, net carrying amount	137,621	$ 142,021
Cost of Revenue
Finite Lived Intangible Assets [Line Items]
2018 (remainder of year)	2,532
2019	9,256
2020	8,338
2021	7,407
2022	6,289
Thereafter	15,963
Amortizable intangible assets, net carrying amount	49,785
Operating Expenses
Finite Lived Intangible Assets [Line Items]
2018 (remainder of year)	4,068
2019	14,945
2020	12,602
2021	11,683
2022	9,829
Thereafter	34,709
Amortizable intangible assets, net carrying amount	$ 87,836