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Acquisitions - Narrative (Detail) - USD ($)
3 Months Ended 5 Months Ended 9 Months Ended
Aug. 19, 2022
Nov. 17, 2021
Mar. 29, 2021
Oct. 29, 2022
Apr. 30, 2022
Apr. 30, 2022
Oct. 29, 2022
Oct. 30, 2021
Business Acquisition [Line Items]                
Cash consideration             $ 397,800,000 $ 14,600,000
Rocksbox                
Business Acquisition [Line Items]                
Cash consideration     $ 14,600,000          
Diamonds Direct                
Business Acquisition [Line Items]                
Cash consideration           $ 503,100,000    
Cash acquired from acquisition   $ 14,200,000            
Additional payment         $ 1,900,000      
Intangible assets   126,000,000.0            
Goodwill, expected tax deductible amount   0            
Diamonds Direct | Trade names                
Business Acquisition [Line Items]                
Intangible assets   $ 126,000,000            
Blue Nile                
Business Acquisition [Line Items]                
Cash consideration $ 395,900,000              
Cash acquired from acquisition 16,600,000              
Intangible assets 102,000,000.0              
Goodwill, expected tax deductible amount 0              
Acquisition and integration related costs       $ 1,500,000     $ 4,100,000  
Other carryforwards 71,000,000              
Blue Nile | Domestic Tax Authority                
Business Acquisition [Line Items]                
Net operating loss 85,000,000              
Blue Nile | Trade names                
Business Acquisition [Line Items]                
Intangible assets $ 102,000,000