Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 5,401	$ 91,103	$ 91,002
Net gains (losses) from foreign currency translation	1,003	(2,164)	(1,143)
Net unrealized holding gains (losses) on available-for-sale investments	5	(34)	12
Total comprehensive income	$ 6,409	$ 88,905	$ 89,871