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Summary of Significant Accounting Policies - Additional Information (Detail)
$ in Thousands
 12 Months Ended
Jan. 31, 2020
USD ($)
Location
Package
Jan. 31, 2019
USD ($)
Location
Jan. 31, 2018
USD ($)
Location
Feb. 01, 2019
USD ($)
Summary Of Significant Accounting Policies [Line Items]        
Amortization expense $ 3,051      
Impairment charges 14,611 $ 3,544 $ 11,410  
Goodwill $ 51,900      
Number of retail locations | Location 8 4 10  
Goodwill impairment $ 13,911      
Lessee, operating lease, description Store leases have remaining lease terms that range from less than one year up to 15 years      
Lessee, operating lease, existence of option to extend true      
Lessee, operating lease, option to extend one or two 5-year periods      
Payment terms of customers 30 days      
Reward coupon expiration period after issuance 60 days      
Sales return reserve $ 51,360 $ 51,990 $ 28,902  
Foreign currency translation losses $ (1,403) (16,585) 23,672  
Number of lease practical expedients package | Package 3      
Lease liabilities $ 1,359,088      
Operating lease right-of-use assets 1,170,531      
Accounting Standards Update 2016-02        
Summary Of Significant Accounting Policies [Line Items]        
Lease liabilities       $ 1,300,000
Operating lease right-of-use assets       $ 1,100,000
Accumulated Other Comprehensive Income (Loss)        
Summary Of Significant Accounting Policies [Line Items]        
Foreign currency translation losses 28,328 26,925    
Unrealized gains (losses) on marketable securities, net of tax 324 (178)    
Change in unrealized gains (losses) on marketable securities, tax 202 105 (137)  
Selling, General and Administrative Expenses        
Summary Of Significant Accounting Policies [Line Items]        
Advertising expense 161,879 143,332 134,632  
Web creative expenses 45,849 41,334 $ 37,099  
Prepaid Expense and Other Current Assets        
Summary Of Significant Accounting Policies [Line Items]        
Advertising costs reported as prepaid expenses $ 1,381 $ 2,466    
Minimum        
Summary Of Significant Accounting Policies [Line Items]        
Lessee, operating lease, term of contract 1 year      
Maximum        
Summary Of Significant Accounting Policies [Line Items]        
Lessee, operating lease, term of contract 15 years      
Leasehold Improvements        
Summary Of Significant Accounting Policies [Line Items]        
Depreciable life (in years) lesser of the lease term or useful life for leasehold improvements      
Furniture and Fixtures        
Summary Of Significant Accounting Policies [Line Items]        
Average useful life (in years) 5 years      
Building        
Summary Of Significant Accounting Policies [Line Items]        
Average useful life (in years) 39 years      
Equipment | Minimum        
Summary Of Significant Accounting Policies [Line Items]        
Average useful life (in years) 3 years      
Equipment | Maximum        
Summary Of Significant Accounting Policies [Line Items]        
Average useful life (in years) 10 years