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Tax Credit Investment (Additional Information) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 31, 2025
Jul. 31, 2024
Jul. 31, 2025
Jul. 31, 2024
Summary of Investment Holdings [Line Items]        
Amortization of tax credit investment     $ 8,587 $ 8,760
Income tax expense $ 39,408 $ 35,079 68,934 54,184
Tax Credit Investment [Member]        
Summary of Investment Holdings [Line Items]        
Interest expense 960 1,256 2,012 2,542
Amortization of tax credit investment 4,294 4,380 8,587 8,760
Income tax expense $ 5,947 $ 6,122 $ 11,914 $ 12,250