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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

X

- 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

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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

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Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity).

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Dividends received on equity and other investments during the current period.

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Amount of consolidated retained earnings that represent undistributed (not yet received) earnings from 50 percent or less owned persons accounted for by the equity method (equity method investees).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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