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Equity - Components of Equity (Parenthetical) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jul. 31, 2025
Jul. 31, 2024
Jul. 31, 2025
Jul. 31, 2024
Dividends per share $ 0.35 $ 0.35 $ 0.7 $ 0.7
Net unrealized (loss) on investments, tax (benefit) $ 0 $ 6 $ (10) $ 7
Net change in effective portion of hedging contracts, tax (benefit) provision 52 (17) (159) (5)
Amortization of prior service cost, tax provision $ 4 $ 4 $ 7 $ 7
Common Stock Class Undefined        
Common Stock, Voting Rights     Each share of common stock is entitled to one vote per share on all matters submitted to a vote of the shareholders.  
Class A Common Stock        
Common Stock, Voting Rights     Each share of class A common stock is entitled to 10 votes per share on all matters submitted to a vote of the shareholders.  
Common stock, Conversion basis     Each holder of class A common stock is entitled to convert, at any time, any and all of such shares into the same number of shares of common stock. Each share of class A common stock is converted automatically into common stock in the event that the beneficial or record ownership of such shares of class A common stock is transferred to any person, except to certain family members or affiliated persons deemed “permitted transferees” pursuant to the Company’s Restated Certificate of Incorporation, as amended.