STOCK-BASED COMPENSATION - Summary of Activity under Company's Stock Option Plans (Details) shares in Thousands	9 Months Ended		12 Months Ended
	Oct. 31, 2021 $ / shares shares	Oct. 31, 2020 $ / shares shares	Jan. 31, 2021 $ / shares shares
STOCK-BASED COMPENSATION
Shares, Outstanding, Beginning balance | shares	1,405
Shares, Granted | shares	32
Shares, Exercised | shares	(41)
Shares, Forfeited | shares	(15)
Shares, Outstanding, Ending balance | shares	1,381	1,364	1,405
Shares, Exercisable | shares	1,053	865
Weighted Average Exercise Price, Outstanding, Beginning balance	$ 44.17
Weighted Average Exercise Price, Granted	54.60
Weighted Average Exercise Price, Exercised	34.05
Weighted Average Exercise Price, Forfeited	50.21
Weighted Average Exercise Price, Outstanding, Ending balance	44.64	$ 44.14	$ 44.17
Weighted Average Exercise Price, Exercisable	$ 45.51	$ 46.40
Weighted Average Remaining Term (Years), Outstanding	6 years 3 months 25 days	6 years 11 months 15 days	6 years 10 months 24 days
Weighted Average Remaining Term (Years), Exercisable	5 years 7 months 28 days	5 years 11 months 19 days
Weighted Average Fair Value, Outstanding	$ 10.46	$ 10.52	$ 10.39
Weighted Average Fair Value, Exercisable	$ 11.18	$ 11.76