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Fair Value (Tables) | 6 Months Ended
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Jul. 31, 2024
Fair Value Disclosures [Abstract] |
Financial Assets Measured at Fair Value on Recurring Basis | The Company’s financial assets that are accounted for at fair value on a recurring basis are presented in the tables below:
|  | Marketable Securities Fair Value as of |
|  | July 31, 2024 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  | $ | — |  |  | $ | 258,930 |  |  | $ | — |  |  | $ | 258,930 |
Federal government agencies |  |  | — |  |  |  | 109,279 |  |  |  | — |  |  |  | 109,279 |
US Treasury securities |  |  | — |  |  |  | 79,197 |  |  |  | — |  |  |  | 79,197 |
Municipal and pre-refunded municipal bonds |  |  | — |  |  |  | 72,326 |  |  |  | — |  |  |  | 72,326 |
Certificates of deposit |  |  | — |  |  |  | 21,499 |  |  |  | — |  |  |  | 21,499 |
Mutual funds, held in rabbi trust |  |  | 17,693 |  |  |  | — |  |  |  | — |  |  |  | 17,693 |
Commercial paper |  |  | — |  |  |  | 2,905 |  |  |  | — |  |  |  | 2,905 |
|  | $ | 17,693 |  |  | $ | 544,136 |  |  | $ | — |  |  | $ | 561,829 |
|  | Marketable Securities Fair Value as of |
|  | January 31, 2024 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  | $ | — |  |  | $ | 270,539 |  |  | $ | — |  |  | $ | 270,539 |
Federal government agencies |  |  | — |  |  |  | 134,413 |  |  |  | — |  |  |  | 134,413 |
US Treasury securities |  |  | — |  |  |  | 61,942 |  |  |  | — |  |  |  | 61,942 |
Municipal and pre-refunded municipal bonds |  |  | — |  |  |  | 86,878 |  |  |  | — |  |  |  | 86,878 |
Certificates of deposit |  |  | — |  |  |  | 21,499 |  |  |  | — |  |  |  | 21,499 |
Mutual funds, held in rabbi trust |  |  | 15,068 |  |  |  | — |  |  |  | — |  |  |  | 15,068 |
Commercial paper |  |  | — |  |  |  | 10,557 |  |  |  | — |  |  |  | 10,557 |
|  | $ | 15,068 |  |  | $ | 585,828 |  |  | $ | — |  |  | $ | 600,896 |
|  | Marketable Securities Fair Value as of |
|  | July 31, 2023 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  | $ | — |  |  | $ | 141,754 |  |  | $ | — |  |  | $ | 141,754 |
Federal government agencies |  |  | — |  |  |  | 91,574 |  |  |  | — |  |  |  | 91,574 |
US Treasury securities |  |  | — |  |  |  | 21,553 |  |  |  | — |  |  |  | 21,553 |
Municipal and pre-refunded municipal bonds |  |  | — |  |  |  | 61,191 |  |  |  | — |  |  |  | 61,191 |
Certificates of deposit |  |  | — |  |  |  | 1,499 |  |  |  | — |  |  |  | 1,499 |
Mutual funds, held in rabbi trust |  |  | 13,898 |  |  |  | — |  |  |  | — |  |  |  | 13,898 |
Commercial paper |  |  | — |  |  |  | 41,719 |  |  |  | — |  |  |  | 41,719 |
|  | $ | 13,898 |  |  | $ | 359,290 |  |  | $ | — |  |  | $ | 373,188 |

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class 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/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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