SUPPLEMENTAL CONDENSED CONSOLIDATED FINANCIAL STATEMENT INFORMATION SUPPLEMENTAL CONDENSED CONSOLIDATED FINANCIAL STATEMENT INFORMATION - OTHER (EXPENSE) INCOME (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Other Income and Expenses [Abstract]
Foreign currency (losses) gains, net	$ (1,458)	$ (1,474)	$ (5,372)	$ 2,384
Gains on derivative financial instruments, net	1,051	834	3,760	292
Other nonoperating income and expense, net	(82)	75	(582)	(147)
Total other (expense) income, net	$ (489)	$ (565)	$ (2,194)	$ 2,529