REVENUE RECOGNITION REVENUE RECOGNITION - CONTRACT BALANCES (Details) - USD ($) $ in Thousands	Apr. 30, 2020	Jan. 31, 2020
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 308,304	$ 382,435
Contract assets, net	62,249	64,961
Long-term contract assets (included in Other assets)	9,260	1,358
Contract liabilities	378,548	397,350
Long-term contract liabilities	$ 40,566	$ 40,565