SUPPLEMENTAL CONDENSED CONSOLIDATED FINANCIAL STATEMENT INFORMATION SUPPLEMENTAL CONDENSED CONSOLIDATED FINANCIAL STATEMENT INFORMATION - OTHER (EXPENSE) INCOME (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Other Income and Expenses [Abstract]
Foreign currency (losses) gains, net	$ (3,361)	$ (2,280)	$ (2,916)	$ 915
Gains on derivative financial instruments, net	142	840	274	103
Other nonoperating income and expense, net	(532)	(289)	(898)	81
Other (expense) income, net	$ (3,751)	$ (1,729)	$ (3,540)	$ 1,099