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ORGANIZATION AND BACKGROUND	12 Months Ended
	Dec. 31, 2014
Organization Consolidation And Presentation Of Financial Statements [Abstract]
ORGANIZATION AND BACKGROUND	NOTE 1—ORGANIZATION AND BACKGROUND         One Liberty Properties, Inc. ("OLP") was incorporated in 1982 in Maryland. OLP is a self-administered and self-managed real estate investment trust ("REIT"). OLP acquires, owns and manages a geographically diversified portfolio of retail, industrial, flex, health and fitness and other properties, a substantial portion of which are subject to long-term net leases. As of December 31, 2014, OLP owned 115 properties, including seven properties owned by consolidated joint ventures and five properties owned by unconsolidated joint ventures. The 115 properties are located in 30 states.

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- Definition

The entire disclosure for the nature of an entity's business, the major products or services it sells or provides and its principal markets, including the locations of those markets. If the entity operates in more than one business, the disclosure also indicates the relative importance of its operations in each business and the basis for the determination (for example, assets, revenues, or earnings).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6003-108592

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