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Marketable Securities - Schedule of Amortized Cost and Estimated Fair Value of Marketable Securities Classified by Maturity Date (Details) - USD ($) $ in Thousands | Mar. 27, 2021 | Dec. 26, 2020
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Available For Sale Securities Debt Maturities Fair Value [Abstract] |  |
Amortized Cost, Due within one year | $ 201,075 | $ 170,099
Amortized Cost, Due after one through five years | 65,153 | 66,550
Amortized Cost, Due after five through ten years | 0 | 0
Amortized Cost, Due after ten years | 0 | 0
Amortized Cost | 266,228 | 236,649
Fair Value, Due within one year | 201,236 | 170,321
Fair Value, Due after one through five years | 65,214 | 66,681
Fair Value, Due after five through ten years | 0 | 0
Fair Value, Due after ten years | 0 | 0
Fair Value, Total marketable securities | $ 266,450 | $ 237,002

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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27198-111563 + Details
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