Selected Quarterly Financial Data (Unaudited) - (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 29, 2017	Oct. 30, 2016	Jul. 31, 2016	May 01, 2016	Jan. 31, 2016	Oct. 25, 2015	Jul. 26, 2015	Apr. 26, 2015	Jan. 29, 2017	Jan. 31, 2016	Jan. 25, 2015
Selected Quarterly Financial Data (in Dollars) [Abstract]
Net sales	$ 140,031	$ 137,185	$ 135,911	$ 131,145	$ 118,609	$ 115,810	$ 125,712	$ 130,088	$ 544,272	$ 490,219	$ 557,885
Gross profit	83,498	81,065	81,775	78,524	69,550	69,584	75,576	78,400	324,862	293,110	328,792
Operating income (loss)	15,288	39,099	16,427	13,267	3,149	18,898	3,068	4,884	84,081	29,999	42,257
Net income (loss)	$ 8,020	$ 30,776	$ 8,978	$ 6,887	$ 1,247	$ 10,704	$ (313)	$ (142)	$ 54,661	$ 11,497	$ 27,947
Earnings Per Share, Basic and Diluted [Abstract]
Basic (in dollars per share)	$ 0.12	$ 0.47	$ 0.14	$ 0.11	$ 0.02	$ 0.16	$ 0.00	$ 0.00	$ 0.84	$ 0.18	$ 0.42
Diluted (in dollars per share)	$ 0.12	$ 0.46	$ 0.14	$ 0.11	$ 0.02	$ 0.16	$ 0.00	$ 0.00	$ 0.83	$ 0.17	$ 0.41
Weighted average number of shares used in computing earnings per share:
Basic (in shares)	65,716	65,549	65,299	65,144	64,934	65,117	65,920	66,713	65,427	65,657	67,108
Diluted (in shares)	66,757	66,206	65,905	65,552	65,225	65,217	65,920	66,713	66,109	65,961	67,685