Revenue Recognition - Revenue Disaggregated by Geography (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 251,073	$ 183,325	$ 587,405	$ 555,856
Americas
Disaggregation of Revenue [Line Items]
Revenue	86,482	64,983	215,696	207,161
Europe
Disaggregation of Revenue [Line Items]
Revenue	60,189	61,092	144,758	180,251
Greater China
Disaggregation of Revenue [Line Items]
Revenue	77,292	30,624	135,593	89,256
Other Asia
Disaggregation of Revenue [Line Items]
Revenue	$ 27,110	$ 26,626	$ 91,358	$ 79,188

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details