DEVELOPMENT (Details)	Sep. 30, 2012
DEVELOPMENT [Abstract]
Percentage of Property Occupation by Tenants when Development Cost Ceased Being Capitalized	80.00%
Length of Time After Project Completion When Development Cost are no Longer Capitalized	1 year

The length of time after a project is completed before development costs are no longer capitalized, stated in years.

No definition available.

Name:	egp_LengthOfTimeAfterProjectCompletionWhenDevelopmentCostCeasedBeingCapitalized
Namespace Prefix:	egp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant