v3.25.2
Cover
Aug. 05, 2025
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Aug. 05, 2025
Entity File Number 001-09279
Entity Registrant Name ONE LIBERTY PROPERTIES, INC.
Entity Central Index Key 0000712770
Entity Tax Identification Number 13-3147497
Entity Incorporation, State or Country Code MD
Entity Address, Address Line One 60 Cutter Mill Road
Entity Address, Address Line Two Suite 303
Entity Address, City or Town Great Neck
Entity Address, State or Province NY
Entity Address, Postal Zip Code 11021
City Area Code 516
Local Phone Number 466-3100
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock
Trading Symbol OLP
Security Exchange Name NYSE
Entity Emerging Growth Company false