Income Tax (Details 1) (USD $) In Thousands, unless otherwise specified	0 Months Ended	12 Months Ended
	Oct. 31, 2012	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Current:
U.S. Federal		$ 8,412	$ 7,296	$ 2,365
U.S. State and Local		770	866	499
Non-U.S.		3,945	5,043	3,559
Total current		13,127	13,205	6,423
Deferred:
U.S. Federal		3,763	183	(18,141)
U.S. State and Local		420	(888)	(495)
Non-U.S.		1,954	4,873	3,401
Total deferred	19,500	6,137	4,168	(15,235)
Provision for / (benefit from) income taxes		$ 19,264	$ 17,373	$ (8,812)