Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013	Jul. 31, 2012
Condensed Consolidated Statements of Comprehensive Income [Abstract]
Net (loss) income	$ (693)	$ 6,402	$ 5,614	$ 14,858
Change in cumulative translation adjustment	(4,610)	(1,911)	(6,191)	(145)
Comprehensive (loss) income	$ (5,303)	$ 4,491	$ (577)	$ 14,713