Length of Time (in years) After Project Completion When Development Cost Ceased Being Capitalized

No definition available.

Name:	egp_LengthofTimeAfterProjectCompletionWhenDevelopmentCostCeasedBeingCapitalized
Namespace Prefix:	egp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Threshold percentage of occupation by tenants when the development cost on a property is no longer capitalized.

+ References

No definition available.

+ Details

Name:	egp_PercentageOfOccupationWhenDevelopmentCostCeasedBeingCapitalized
Namespace Prefix:	egp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The expense recognized in the current period that allocates the cost of a tangible asset used in providing revenue generating services over the asset's useful life.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2(d))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

Name:	us-gaap_CostOfServicesDepreciation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=egp_ImprovementsAndPersonalPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

SIGNIFICANT ACCOUNTING POLICIES (Details 2) (USD $)	12 Months Ended
SIGNIFICANT ACCOUNTING POLICIES (Details 2) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Cost of Services, Depreciation	$ 57,303,000us-gaap_CostOfServicesDepreciation	$ 54,284,000us-gaap_CostOfServicesDepreciation	$ 51,564,000us-gaap_CostOfServicesDepreciation
Percentage of Occupation When Development Cost Ceased Being Capitalized	80.00%
Length of Time After Project Completion When Development Cost Ceased Being Capitalized	1 year
Buildings [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	40 years
Improvements [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	3 years
Improvements [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	15 years