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Equity - Components of Equity (Parenthetical) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended 9 Months Ended
Oct. 31, 2025
Oct. 31, 2024
Jul. 31, 2025
Oct. 31, 2025
Oct. 31, 2024
Dividends per share $ 0.35 $ 0.35   $ 1.05 $ 1.05
Net unrealized (loss) on investments, tax (benefit) $ 4 $ 1   $ (6) $ 8
Net change in effective portion of hedging contracts, tax (benefit) provision 159 39   (0) 34
Amortization of prior service cost, tax provision $ 3 $ 3   $ 10 $ 10
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.