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Fair Value Measurements - (Tables) | 9 Months Ended
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Sep. 25, 2021
Fair Value Disclosures [Abstract] |
Schedule of Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis | The following tables provide the assets and liabilities carried at fair value measured on a recurring basis at September 25, 2021 and December 26, 2020:
|  |  |  |  |  | Fair Value Measurements Using |
|  | Carrying Value |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
September 25, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Municipal notes and bonds |  | $ | 157,411 |  |  | $ | — |  |  | $ | 157,411 |  |  | $ | — |
Asset-backed securities |  |  | 3,231 |  |  |  | — |  |  |  | 3,231 |  |  |  | — |
Certificates of deposit |  |  | 37,714 |  |  |  | — |  |  |  | 37,714 |  |  |  | — |
Commercial paper |  |  | 66,727 |  |  |  | — |  |  |  | 66,727 |  |  |  | — |
Corporate bonds |  |  | 44,261 |  |  |  | — |  |  |  | 44,261 |  |  |  | — |
Total assets |  | $ | 309,344 |  |  | $ | — |  |  | $ | 309,344 |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency forward contracts |  |  | 68 |  |  |  | — |  |  |  | 68 |  |  |  | — |
Total liabilities |  | $ | 68 |  |  | $ | — |  |  | $ | 68 |  |  | $ | — |
December 26, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Municipal notes and bonds |  | $ | 124,640 |  |  | $ | — |  |  | $ | 124,640 |  |  | $ | — |
Asset-backed securities |  |  | 11,708 |  |  |  | — |  |  |  | 11,708 |  |  |  | — |
Certificates of deposit |  |  | 36,373 |  |  |  | — |  |  |  | 36,373 |  |  |  | — |
Commercial paper |  |  | 32,699 |  |  |  | — |  |  |  | 32,699 |  |  |  | — |
Corporate bonds |  |  | 31,582 |  |  |  | — |  |  |  | 31,582 |  |  |  | — |
Total assets |  | $ | 237,002 |  |  | $ | — |  |  | $ | 237,002 |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency forward contracts |  |  | 36 |  |  |  | — |  |  |  | 36 |  |  |  | — |
Total liabilities |  | $ | 36 |  |  | $ | — |  |  | $ | 36 |  |  | $ | — |

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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