CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Common shares, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common shares, authorized	70,000,000us-gaap_CommonStockSharesAuthorized	70,000,000us-gaap_CommonStockSharesAuthorized
Common shares, issued	32,232,587us-gaap_CommonStockSharesIssued	30,937,225us-gaap_CommonStockSharesIssued
Common shares, outstanding	32,232,587us-gaap_CommonStockSharesOutstanding	30,937,225us-gaap_CommonStockSharesOutstanding
Excess shares, par value (in dollars per share)	$ 0.0001egp_ExcessSharesParValue	$ 0.0001egp_ExcessSharesParValue
Excess shares, authorized	30,000,000egp_ExcessSharesAuthorized	30,000,000egp_ExcessSharesAuthorized
Excess shares, issued	0egp_ExcessSharesIssued	0egp_ExcessSharesIssued

The maximum number of excess shares permitted to be issued by an entity's charter and bylaws.

No definition available.

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Balance Type:	na
Period Type:	instant

- Definition

The number of excess shares sold or granted to shareholders.

+ References

No definition available.

+ Details

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Namespace Prefix:	egp_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Face amount or stated value of excess shares per share; generally not indicative of the fair market value per share.

+ References

No definition available.

+ Details

Name:	egp_ExcessSharesParValue
Namespace Prefix:	egp_
Data Type:	num:perShareItemType
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Period Type:	instant

- Definition

Face amount or stated value per share of common stock.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 30

-Article 5

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
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Period Type:	instant

- Definition

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

+ References

+ Details

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Balance Type:	na
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- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 30

-Article 5

+ Details

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