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Cash, Cash Equivalents, and Investments (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jul. 04, 2021 | Jun. 28, 2020 | Jul. 04, 2021 | Jun. 28, 2020 | Dec. 31, 2020
Cash and Cash Equivalents [Line Items] |  |  |  |  |
Debt securities, available-for-sale, allowance for credit loss | $ 0 |  | $ 0 |  | $ 0
Credit loss on investments | 0 | $ 0 |  | $ 160 |
Gross recoveries |  | 85 |  | 85 |
Gross realized gains on sale of investments | 68 | 962 | 68 | 2,826 |
Gross realized losses on sale of investments | 0 | $ 7 | 0 | $ 21 |
Other Current Assets |  |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |  |
Accrued interest receivable | $ 2,992 |  | $ 2,992 |  | $ 1,560

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- Definition Amount of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aaa) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
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