Document and Entity Information
Dec. 10, 2019
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Dec. 10, 2019
Entity Registrant Name Ollie's Bargain Outlet Holdings, Inc.
Entity Incorporation, State or Country Code DE
Entity File Number 001-37501
Entity Tax Identification Number 80-0848819
Entity Address, Address Line One 6295 Allentown Boulevard
Entity Address, Address Line Two Suite 1
Entity Address, City or Town Harrisburg
Entity Address, State or Province PA
Entity Address, Postal Zip Code 17112
City Area Code 717
Local Phone Number 657-2300
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Entity Central Index Key 0001639300
Title of 12(b) Security Common Stock, $0.001 par value
Trading Symbol OLLI
Security Exchange Name NASDAQ