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Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 02, 2020	Apr. 27, 2019	May 02, 2020	Apr. 27, 2019
Income Statement [Abstract]
Revenue, net	$ 371,726	$ 408,893	$ 1,268,325	$ 1,145,409
Cost of goods sold	220,115	224,445	713,225	632,644
Gross profit	151,611	184,448	555,100	512,765
Selling, general, and administrative expenses	197,666	189,015	592,497	491,024
Operating income (loss)	(46,055)	(4,567)	(37,397)	21,741
Interest (income) expense	(1,372)	(1,463)	(4,502)	(4,032)
Other (income) expense, net	569	(391)	1,431	(964)
Income (loss) before income taxes	(45,252)	(2,713)	(34,326)	26,737
Provision (benefit) for income taxes	(11,349)	(9,761)	(11,676)	(2,965)
Net income (loss)	(33,903)	7,048	(22,650)	29,702
Other comprehensive income (loss):
Change in unrealized gain (loss) on available-for-sale securities, net of tax	994	140	1,069	162
Foreign currency translation	(1,773)	(190)	633	(71)
Total other comprehensive income (loss), net of tax	(779)	(50)	1,702	91
Comprehensive income (loss)	(34,682)	6,998	(20,948)	29,793
Net income (loss) attributable to common stockholders:
Basic	(33,903)	7,048	(22,650)	29,681
Diluted	$ (33,903)	$ 7,048	$ (22,650)	$ 29,682
Earnings (loss) per share attributable to common stockholders:
Basic (in dollars per share)	$ (0.33)	$ 0.07	$ (0.22)	$ 0.30
Diluted (in dollars per share)	$ (0.33)	$ 0.07	$ (0.22)	$ 0.29
Weighted-average shares used to compute earnings (loss) per share attributable to common stockholders:
Basic (in shares)	102,650,155	100,301,078	102,084,729	99,619,426
Diluted (in shares)	102,650,155	103,615,159	102,084,729	103,575,702

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Amount of income (expense) related to nonoperating activities, classified as other.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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