v3.5.0.2
Document and Entity Information - shares
9 Months Ended
Oct. 29, 2016
Dec. 08, 2016
Document and Entity Information [Abstract]    
Entity Registrant Name Ollie's Bargain Outlet Holdings, Inc.  
Entity Central Index Key 0001639300  
Current Fiscal Year End Date --01-28  
Entity Well-known Seasoned Issuer Yes  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Filer Category Non-accelerated Filer  
Entity Common Stock, Shares Outstanding   60,610,487
Document Fiscal Year Focus 2016  
Document Fiscal Period Focus Q3  
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Oct. 29, 2016