CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012
Statement Of Income And Comprehensive Income [Abstract]
Net (loss) income	$ (2,628)	$ (1,222)	$ 2,986	$ 13,636
Change in cumulative translation adjustment	1,488	508	(4,703)	363
Comprehensive (loss) income	$ (1,140)	$ (714)	$ (1,717)	$ 13,999