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Investments (Details) - USD ($) | 6 Months Ended |
--- | --- | ---
Jul. 31, 2025 | Jul. 31, 2024 | Jan. 31, 2025
Disclosure Text Block Supplement [Abstract] |  |  |
Retained Earnings, Undistributed Earnings from Equity Method Investees | $ 15,200,000 |  | $ 15,800,000
Proceeds from Dividends Received | 2,500,000 | $ 0 |
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss | $ 69,500,000 |  | $ 162,800,000
Debt Securities, Held-to-Maturity, Weighted Average Yield, Maturity, Year One | 4.30% |  | 4.40%
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss | $ 32,000 |  | $ 19,000

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- Definition Weighted average yield of investment in debt security measured at amortized cost (held-to-maturity) maturing in next 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://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1403 -Paragraph a -Subparagraph (1) -Publisher SEC + Details
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- Definition Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482736/825-10-45-1A Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-7A Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-14 + Details
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