Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2020	Jul. 23, 2020
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Trading Symbol	GTY
Entity Registrant Name	GETTY REALTY CORP.
Entity Central Index Key	0001052752
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		41,913,431
Entity File Number	001-13777
Entity Tax Identification Number	11-3412575
Entity Address, Address Line One	Two Jericho Plaza
Entity Address, Address Line Two	Suite 110
Entity Address, City or Town	Jericho
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	11753
City Area Code	516
Local Phone Number	478-5400
Entity Incorporation, State or Country Code	MD
Title of 12(b) Security	Common Stock
Security Exchange Name	NYSE
Document Quarterly Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes