Leases - Additional Information (Details) $ in Thousands	12 Months Ended
	Jul. 31, 2021 USD ($) renewalOption	Aug. 01, 2020 USD ($)	Aug. 04, 2019 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, right-of-use assets	$ 118,565	$ 132,615
Operating lease liabilities	$ 147,325
Number of renewal options | renewalOption	1
Weighted average remaining lease term	6 years	6 years 8 months 12 days
Weighted average discount rate, percent	4.90%	4.80%
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, right-of-use assets			$ 133,000
Operating lease liabilities			$ 158,700
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Term of lease contracts	5 years
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Term of lease contracts	8 years