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SEC Schedule, Article 12-04, Condensed Financial Information of Registrant (Tables) | 9 Months Ended
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Oct. 30, 2021
Condensed Financial Information Disclosure [Abstract] |
Debt Securities, Held-to-maturity | Such securities are carried at amortized cost plus accrued interest and consist of the following (in thousands):
|  | As of October 30, 2021
|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Market Value
Short-term: |  |  |  |  |  |  |  |
Corporate bonds |  | $ | 190,700 |  |  | $ | 6 |  |  | $ | 82 |  |  | $ | 190,624 |
Municipal bonds |  | 33,863 |  |  | — |  |  | 11 |  |  | 33,852 |
Total |  | $ | 224,563 |  |  | $ | 6 |  |  | $ | 93 |  |  | $ | 224,476 |
|  | As of January 30, 2021
|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Market Value
Short-term: |  |  |  |  |  |  |  |
Corporate bonds |  | $ | 95,530 |  |  | $ | — |  |  | $ | 53 |  |  | $ | 95,477 |
Municipal bonds |  | 45,398 |  |  | — |  |  | 7 |  |  | 45,391 |
Total |  | $ | 140,928 |  |  | $ | — |  |  | $ | 60 |  |  | $ | 140,868 |
|  | As of October 31, 2020
|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Market Value
Short-term: |  |  |  |  |  |  |  |
Corporate bonds |  | $ | 78,516 |  |  | $ | — |  |  | $ | 43 |  |  | $ | 78,473 |
Municipal bonds |  | 18,233 |  |  | — |  |  | 7 |  |  | 18,226 |
Total |  | $ | 96,749 |  |  | $ | — |  |  | $ | 50 |  |  | $ | 96,699 |

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- Definition Tabular disclosure of information about investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5B -URI http://asc.fasb.org/extlink&oid=121645371&loc=SL120269825-111563 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5A -URI http://asc.fasb.org/extlink&oid=121645371&loc=SL120269820-111563 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27232-111563 + Details
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