Stock-based Compensation - Stock Option Activities (Detail) $ / shares in Units, $ in Thousands	3 Months Ended
	Apr. 30, 2024 USD ($) $ / shares shares
Share-Based Payment Arrangement [Abstract]
Shares, Outstanding | shares	373,318
Shares, Exercised | shares	(32,065)
Shares, Expired | shares	(62)
Shares, Outstanding | shares	341,191
Shares, Exercisable | shares	304,129
Weighted-Average Exercise Price, Outstanding | $ / shares	$ 46.39
Weighted-Average Exercise Price, Exercised | $ / shares	37.72
Weighted-Average Exercise Price, Expired | $ / shares	11.16
Weighted-Average Exercise Price, Outstanding | $ / shares	47.21
Weighted-Average Exercise Price, Exercisable | $ / shares	$ 48.61
Total Intrinsic Value Of Options Exercised | $	$ 351
Weighted-Average Remaining Contractual Term, Outstanding	3 years 5 months 4 days
Weighted-Average Remaining Contractual Term, Exercisable	3 years 18 days
Aggregate Intrinsic Value, Outstanding | $	$ 1,956
Aggregate Intrinsic Value, Exercisable | $	$ 1,409