CASH DIVIDENDS (Details) - $ / shares	1 Months Ended						12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Oct. 31, 2017	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
CASH DIVIDENDS
Regular cash dividend declared per common stock							$ 1.00	$ 1.00	$ 1.00
Regular cash dividend paid per common stock	$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 1.00