v3.10.0.1
Document and Entity Information - shares
9 Months Ended
Nov. 03, 2018
Dec. 04, 2018
Document and Entity Information [Abstract]    
Entity Registrant Name Ollie's Bargain Outlet Holdings, Inc.  
Entity Central Index Key 0001639300  
Current Fiscal Year End Date --02-02  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Ex Transition Period false  
Entity Common Stock, Shares Outstanding   62,881,216
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Nov. 03, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q3