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Intangible Assets - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2020 | Sep. 27, 2020 | Jun. 28, 2020 | Mar. 29, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | May 26, 2020
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Intangible asset impairment charges | $ 0 | $ 0 | $ 19,571 | $ 0 | $ 19,571 | $ 0 | $ 0 |
Accumulated amortization | 58,120 |  |  |  | 58,120 | 53,984 |  |
Completed Technologies [Member] |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Accumulated amortization | 12,397 |  |  |  | 12,397 | 9,160 |  |
Customer Contracts And Relationships [Member] |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Accumulated amortization | $ 7,160 |  |  |  | $ 7,160 | $ 6,402 |  |
Sualab Co., Ltd. [Member] | In Process Research and Development [Member] |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Intangible asset impairment charges |  |  | 5,900 |  |  |  |  |
Sualab Co., Ltd. [Member] | Completed Technologies [Member] |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Intangible asset impairment charges |  |  | 10,070 |  |  |  |  |
Sualab Co., Ltd. [Member] | Customer Contracts And Relationships [Member] |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Intangible asset impairment charges |  |  | 3,382 |  |  |  |  |
EnShape GmbH [Abstract] | Customer Contracts And Relationships [Member] |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Intangible asset impairment charges |  |  | 219 |  |  |  |  |
Intangible assets |  |  | $ 0 |  |  |  |  | $ 447
Accumulated amortization |  |  |  |  |  |  |  | $ 228

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- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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