STOCKHOLDERS' EQUITY - Stock Repurchase Programs (Details) - USD ($)	3 Months Ended				6 Months Ended	9 Months Ended		12 Months Ended
	Oct. 31, 2021	Jul. 31, 2021	Apr. 30, 2021	Apr. 30, 2020	Oct. 31, 2021	Oct. 31, 2021	Oct. 31, 2020	Jan. 31, 2021	Jan. 31, 2020	Dec. 02, 2021	Dec. 04, 2019
Class of Stock [Line Items]
Treasury stock repurchased	$ 473,000	$ 12,000	$ 25,868,000	$ 33,990,000			$ 34,000,000
Number of common stock acquired (in shares)						1,613,000
Cost of common stock repurchased						$ 75,900,000
2019 Share Repurchase Program
Class of Stock [Line Items]
Stock repurchase program, authorized amount											$ 300,000,000
Treasury stock repurchased								$ 34,000,000	$ 116,100,000
2021 Share Repurchase Program
Class of Stock [Line Items]
Number of common stock acquired (in shares)			1,600,000		0
Cost of common stock repurchased			$ 75,400,000			$ 75,400,000
2021 Share Repurchase Program | Subsequent Event
Class of Stock [Line Items]
Stock repurchase program, number of shares authorized (up to) (in shares)										1,500,000