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Stock-based Compensation - Stock Option Activities (Detail)
$ / shares in Units, $ in Thousands
 6 Months Ended
Jul. 31, 2025
USD ($)
$ / shares
shares
Share-Based Payment Arrangement [Abstract]  
Shares, Outstanding | shares 226,616
Shares, Exercised | shares (17,284)
Shares, Expired | shares (9,119)
Shares, Outstanding | shares 200,213
Shares, Exercisable | shares 200,154
Weighted-Average Exercise Price, Outstanding | $ / shares $ 52.2
Weighted-Average Exercise Price, Exercised | $ / shares 42.97
Weighted-Average Exercise Price, Expired | $ / shares 76.52
Weighted-Average Exercise Price, Outstanding | $ / shares 51.89
Weighted-Average Exercise Price, Exercisable | $ / shares $ 51.9
Total Intrinsic Value Of Options Exercised | $ $ 440
Weighted-Average Remaining Contractual Term, Outstanding 2 years 7 months 24 days
Weighted-Average Remaining Contractual Term, Exercisable 2 years 7 months 20 days
Aggregate Intrinsic Value, Outstanding | $ $ 3,417
Aggregate Intrinsic Value, Exercisable | $ $ 3,414