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DERIVATIVE FINANCIAL INSTRUMENTS - CASH FLOW HEDGES (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	May 01, 2020	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019	Jan. 31, 2020
DERIVATIVE FINANCIAL INSTRUMENTS
Reclassification of cash flow hedge gain (loss), before Tax	$ 20,400
Accumulated other comprehensive income (Loss), net of tax		$ (158,295)		$ (158,295)		$ (151,865)
Cash flow hedging \| Designated as cash flow hedges
DERIVATIVE FINANCIAL INSTRUMENTS
Net gains (losses) recognized in other comprehensive income (loss)		1,519	$ (2,904)	(6,941)	$ (4,579)
Reclassification of cash flow hedge gain (loss), before Tax		(1,081)	0	(1,724)	(939)
Foreign Exchange Contract \| Cash flow hedging \| Designated as cash flow hedges
DERIVATIVE FINANCIAL INSTRUMENTS
Net gains (losses) recognized in other comprehensive income (loss)		1,519	1,637	594	1,979
Reclassification of cash flow hedge gain (loss), before Tax		39	0	(13)	(939)
Foreign Exchange Contract \| Cash flow hedging \| Designated as cash flow hedges \| Unrealized gains (losses) on derivative financial instruments designated as hedges
DERIVATIVE FINANCIAL INSTRUMENTS
Net gains on foreign currency forward contracts expected to be reclassified to earnings during next 12 months		1,100		1,100
Interest Rate Swap \| Cash flow hedging \| Designated as cash flow hedges
DERIVATIVE FINANCIAL INSTRUMENTS
Net gains (losses) recognized in other comprehensive income (loss)		0	(4,541)	(7,535)	(6,558)
Reclassification of cash flow hedge gain (loss), before Tax		(1,120)	$ 0	(1,711)	$ 0
2018 Interest Rate Swap \| Cash flow hedging \| Designated as cash flow hedges
DERIVATIVE FINANCIAL INSTRUMENTS
Net losses on interest rate swaps expected to be reclassified to earnings during next 12 months		4,100		4,100
2018 Interest Rate Swap \| Cash flow hedging \| Designated as cash flow hedges \| Unrealized gains (losses) on derivative financial instruments designated as hedges
DERIVATIVE FINANCIAL INSTRUMENTS
Accumulated other comprehensive income (Loss), net of tax		$ (15,100)		$ (15,100)