Description of Business	3 Months Ended
Mar. 31, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Description of Business	NOTE 1. — DESCRIPTION OF BUSINESS Getty Realty Corp. (together with its subsidiaries, unless otherwise indicated or except where the context otherwise requires, “we,” “us” or “our”) is the leading publicly-traded real estate investment trust (“REIT”) in the United States specializing in the ownership, leasing and financing of convenience store and gasoline station properties. As of March 31, 2020, we owned 885 properties and leased 62 properties from third-party landlords. These 947 properties are located in 35 states across the United States and Washington, D.C. Our tenants operate our properties under a variety of national and regional convenience store, motor fuel, and automotive service and other retail brands. In addition, we lease approximately 8,900 square feet of office space, which is used for our corporate headquarters. Our company was originally founded in 1955 and is headquartered in Jericho, New York.

The entire disclosure for the nature of an entity's business, major products or services, principal markets including location, and the relative importance of its operations in each business and the basis for the determination, including but not limited to, assets, revenues, or earnings. For an entity that has not commenced principal operations, disclosures about the risks and uncertainties related to the activities in which the entity is currently engaged and an understanding of what those activities are being directed toward.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e5967-108592

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-URI http://asc.fasb.org/topic&trid=2134479

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