CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 4,768	$ 17,051	$ 24,321
Change in cumulative translation adjustment	(10,069)	977	150
Comprehensive (loss) income	$ (5,301)	$ 18,028	$ 24,471