STOCKHOLDERS' EQUITY STOCKHOLDERS' EQUITY - SCHEDULE OF ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Activity in Accumulated Other Comprehensive Loss
Accumulated other comprehensive loss - beginning balance	$ (151,865)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(27,418)
Amounts reclassified out of accumulated other comprehensive income (loss)	(509)
Net other comprehensive income (loss), current period	(26,909)
Accumulated other comprehensive income (loss) - ending balance	(178,774)
Foreign Exchange Contract
Activity in Accumulated Other Comprehensive Loss
Amounts reclassified out of accumulated other comprehensive income (loss)	(46)	$ (845)
Interest rate swap
Activity in Accumulated Other Comprehensive Loss
Amounts reclassified out of accumulated other comprehensive income (loss)	(463)	$ 0
Unrealized gains (losses) on derivative financial instruments designated as hedges | Foreign Exchange Contract
Activity in Accumulated Other Comprehensive Loss
Accumulated other comprehensive loss - beginning balance	626
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(829)
Amounts reclassified out of accumulated other comprehensive income (loss)	(46)
Net other comprehensive income (loss), current period	(783)
Accumulated other comprehensive income (loss) - ending balance	(157)
Unrealized gains (losses) on derivative financial instruments designated as hedges | Interest rate swap
Activity in Accumulated Other Comprehensive Loss
Accumulated other comprehensive loss - beginning balance	(10,528)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(5,949)
Amounts reclassified out of accumulated other comprehensive income (loss)	(463)
Net other comprehensive income (loss), current period	(5,486)
Accumulated other comprehensive income (loss) - ending balance	(16,014)
Foreign currency translation adjustments
Activity in Accumulated Other Comprehensive Loss
Accumulated other comprehensive loss - beginning balance	(141,963)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(20,640)
Amounts reclassified out of accumulated other comprehensive income (loss)	0
Net other comprehensive income (loss), current period	(20,640)
Accumulated other comprehensive income (loss) - ending balance	$ (162,603)