Selected Quarterly Financial Data (Unaudited) - (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 31, 2016	Oct. 25, 2015	Jul. 26, 2015	Apr. 26, 2015	Jan. 25, 2015	Oct. 26, 2014	Jul. 27, 2014	Apr. 27, 2014	Jan. 31, 2016	Jan. 25, 2015	Jan. 26, 2014
Selected Quarterly Financial Data (in Dollars) [Abstract]
Net sales	$ 118,609	$ 115,810	$ 125,712	$ 130,088	$ 130,394	$ 148,890	$ 145,742	$ 132,859	$ 490,219	$ 557,885	$ 594,977
Gross profit	69,550	69,584	75,576	78,400	73,161	89,326	88,221	78,084	293,110	328,792	335,211
Operating income (loss)	3,149	18,898	3,068	4,884	(13,759)	22,810	22,057	11,149	29,999	42,257	(108,917)
Net income (loss)	$ 1,247	$ 10,704	$ (313)	$ (142)	$ (15,441)	$ 17,623	$ 17,898	$ 7,867	$ 11,497	$ 27,947	$ (164,466)
Earnings Per Share, Basic and Diluted [Abstract]
Basic (in dollars per share)	$ 0.02	$ 0.16	$ 0.00	$ 0.00	$ (0.23)	$ 0.26	$ 0.27	$ 0.12	$ 0.18	$ 0.42	$ (2.44)
Diluted (in dollars per share)	$ 0.02	$ 0.16	$ 0.00	$ 0.00	$ (0.23)	$ 0.26	$ 0.26	$ 0.12	$ 0.17	$ 0.41	$ (2.44)
Weighted average number of shares used in computing earnings per share:
Basic (in shares)	64,934	65,117	65,920	66,713	66,763	67,162	67,208	67,300	65,657	67,108	67,471
Diluted (in shares)	65,225	65,217	65,920	66,713	66,763	67,654	67,850	67,970	65,961	67,685	67,471