STOCK-BASED COMPENSATION - Summary of Activity under Company's Stock Option Plans (Details) - USD ($)	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
STOCK-BASED COMPENSATION
Shares, Outstanding, Beginning balance	1,365,000
Shares, Granted	6,000	20,500	67,000
Shares, Exercised	(902,000)
Shares, Forfeited	(19,000)
Shares, Outstanding, Ending balance	450,000	1,365,000
Shares, Exercisable	412,000
Shares, Vested or expected to vest	450,000
Weighted Average Exercise Price Per Share, Outstanding, Beginning balance	$ 44.95
Weighted Average Exercise Price Per Share, Granted	61.22
Weighted Average Exercise Price Per Share, Exercised	45.17
Weighted Average Exercise Price Per Share, Forfeited	45.28
Weighted Average Exercise Price Per Share, Outstanding, Ending balance	44.72	$ 44.95
Weighted Average Exercise Price Per Share, Exercisable	44.98
Weighted Average Exercise Price Per Share, Vested or expected to vest	$ 44.72
Weighted Average Remaining Contractual Term (Years), Outstanding	4 years 9 months 3 days	4 years 8 months 1 day
Weighted Average Remaining Contractual Term (Years), Exercisable	4 years 5 months 15 days
Weighted Average Remaining Contractual Term (Years), Vested or expected to vest	4 years 9 months 3 days
Weighted Average Grant Date Fair Value Per Share, Outstanding	$ 9.89	$ 10.43
Weighted Average Grant Date Fair Value Per Share, Exercisable	$ 10.01
Weighted Average Grant Date Fair Value Per Share, Vested or expected to vest	$ 9.89