v2.4.0.8
Document And Entity Information
6 Months Ended
Jun. 29, 2014
Aug. 01, 2014
Entity Information [Line Items]    
Entity Registrant Name BLUE NILE INC  
Entity Central Index Key 0001091171  
Document Type 10-Q  
Document Period End Date Jun. 29, 2014  
Amendment Flag false  
Document Fiscal Year Focus 2014  
Document Fiscal Period Focus Q2  
Current Fiscal Year End Date --01-04  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   11,837,200