Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 29, 2017	Jul. 30, 2016	Jul. 29, 2017	Jul. 30, 2016
Income Statement [Abstract]
Net revenues	$ 615,326	$ 543,381	$ 1,177,406	$ 998,837
Cost of goods sold	409,513	363,542	801,337	691,523
Gross profit	205,813	179,839	376,069	307,314
Selling, general and administrative expenses	193,690	157,824	357,050	296,774
Income from operations	12,123	22,015	19,019	10,540
Interest expense—net	14,402	10,909	26,581	21,437
Income (loss) before income taxes	(2,279)	11,106	(7,562)	(10,897)
Income tax expense (benefit)	5,583	4,188	3,670	(4,345)
Net income (loss)	$ (7,862)	$ 6,918	$ (11,232)	$ (6,552)
Weighted-average shares used in computing basic net income (loss) per share	28,398,307	40,646,124	35,667,217	40,617,102
Basic net income (loss) per share	$ (0.28)	$ 0.17	$ (0.31)	$ (0.16)
Weighted-average shares used in computing diluted net income (loss) per share	28,398,307	40,820,495	35,667,217	40,617,102
Diluted net income (loss) per share	$ (0.28)	$ 0.17	$ (0.31)	$ (0.16)