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Revenue Contract Assets and Deferred Revenue (Details) - USD ($) $ in Thousands | Sep. 25, 2020 | Dec. 31, 2019
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Prepaid Expenses and Other Current Assets [Member] |  |
Capitalized Contract Cost [Line Items] |  |
Contract assets | $ 4,067 | $ 13,969
Other Noncurrent Liabilities [Member] |  |
Capitalized Contract Cost [Line Items] |  |
Deferred revenue | $ 49,650 | $ 43,450

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- Definition Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054 + Details
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