SUPPLEMENTAL CONDENSED COMBINING FINANCIAL INFORMATION - Additional Information (Detail)	Dec. 31, 2011
Supplemental Condensed Consolidating Financial Information [Line Items]
The number of properties leased to Marketing under the Master Lease presented as a percentage of all properties in the Getty Realty portfolio	69.00%

The number of properties leased to Marketing under the Master Lease presented as a percentage of all properties in the Getty Realty portfolio.

No definition available.

Name:	gty_NumberOfPropertiesLeasedToMarketingAsPercentageOfAllProperties
Namespace Prefix:	gty_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant