Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 28, 2017	Oct. 29, 2016	Oct. 28, 2017	Oct. 29, 2016
Income Statement [Abstract]
Net revenues	$ 592,473	$ 549,328	$ 1,769,879	$ 1,548,165
Cost of goods sold	378,148	373,509	1,179,485	1,065,032
Gross profit	214,325	175,819	590,394	483,133
Selling, general and administrative expenses	171,163	160,433	528,213	457,207
Income from operations	43,162	15,386	62,181	25,926
Other expenses
Interest expense—net	18,915	11,091	45,496	32,528
Loss on extinguishment of debt	4,880		4,880
Total other expenses	23,795	11,091	50,376	32,528
Income (loss) before income taxes	19,367	4,295	11,805	(6,602)
Income tax expense (benefit)	6,216	1,778	9,886	(2,567)
Net income (loss)	$ 13,151	$ 2,517	$ 1,919	$ (4,035)
Weighted-average shares used in computing basic net income (loss) per share	21,221,848	40,730,059	29,076,556	40,653,091
Basic net income (loss) per share	$ 0.62	$ 0.06	$ 0.07	$ (0.10)
Weighted-average shares used in computing diluted net income (loss) per share	23,535,617	40,926,450	30,593,382	40,653,091
Diluted net income (loss) per share	$ 0.56	$ 0.06	$ 0.06	$ (0.10)