Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2016	May. 02, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ (13,470)	$ 7,156
Net gains (losses) from foreign currency translation	2,669	220
Net unrealized holding gains (losses) on available-for-sale investments	92	(2)
Total comprehensive income (loss)	$ (10,709)	$ 7,374