Leases - Supplemental Cash Flows Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2021	Aug. 01, 2020
Leases [Abstract]
Cash paid for amounts included in the measurement of operating lease liabilities	$ 33,061	$ 28,922
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	$ 8,766	$ 153,522