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Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands | Sep. 26, 2020 | Dec. 28, 2019
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Finite-Lived Intangible Assets [Line Items] |  |
Intangible Assets, Gross | $ 209,733 | $ 208,672
Accumulated Amortization | 171,796 | 151,062
Intangible Assets, Net | 37,937 | 57,610
Developed technologies |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible Assets, Gross | 156,659 | 154,951
Accumulated Amortization | 131,289 | 116,138
Intangible Assets, Net | 25,370 | 38,813
Trade names |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible Assets, Gross | 7,870 | 7,816
Accumulated Amortization | 7,231 | 6,976
Intangible Assets, Net | 639 | 840
Customer relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible Assets, Gross | 43,460 | 44,229
Accumulated Amortization | 31,532 | 27,057
Intangible Assets, Net | 11,928 | 17,172
Backlog |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible Assets, Gross | 1,744 | 1,676
Accumulated Amortization | 1,744 | 891
Intangible Assets, Net | $ 0 | $ 785

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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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- Definition Amount before 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 928 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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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