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Net Income per Common Share - Reconciliation of Weighted Average Common Shares Outstanding Used for Computation of Basic and Diluted Net Income per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Apr. 30, 2024	Apr. 30, 2023
Earnings Per Share [Abstract]
Net Income (Loss)	$ 61,765	$ 52,817
Basic weighted-average common shares outstanding	93,124,568	92,474,688
Effect of dilutive options, performance stock units and restricted stock units	1,876,138	1,346,604
Diluted weighted-average shares outstanding	95,000,706	93,821,292
Basic	$ 0.66	$ 0.57
Diluted	$ 0.65	$ 0.56

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