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Leases - Additional Information (Details)
$ in Thousands, ft² in Millions
9 Months Ended
May 02, 2020
USD ($)
renewal_option
Jan. 14, 2020
USD ($)
ft²
Aug. 04, 2019
USD ($)
Aug. 03, 2019
USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Operating lease, right-of-use assets $ 134,216 $ 14,000   $ 0
Operating lease liabilities $ 165,634 $ 19,600   $ 179,790
Term of operating lease   10 years    
Number of renewal options | renewal_option 1      
Weighted average remaining lease term 6 years 10 months 24 days      
Weighted average discount rate, percent 4.80%      
Area of leased space | ft²   0.7    
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 operating lease 5 years      
Maximum        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Term of operating lease 8 years