The number of shares of the company's common stock each share of acquiree's common stock would be converted into.

No definition available.

Name:	egbn_BusinessCombinationSharesPerAcquireesCommonStock
Namespace Prefix:	egbn_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Common stock dividend, percentage of shares issued of shares held.

+ References

No definition available.

+ Details

Name:	egbn_CommonStockDividendRate
Namespace Prefix:	egbn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	egbn_Note11PreferredStockandWarrantsDetailsLineItems
Namespace Prefix:	egbn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the redemption price as a percentage of the liquidation amount plus accrued but unpaid dividends.

+ References

No definition available.

+ Details

Name:	egbn_PreferredStockRedemptionPricePercentage
Namespace Prefix:	egbn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

+ Details

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(i)(2))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph i

-Subparagraph 2

-Article 4

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage rate used to calculate dividend payments on preferred stock.

+ References

No definition available.

+ Details

Name:	us-gaap_PreferredStockDividendRatePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph d

-Article 4

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(d)(1))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_PreferredStockLiquidationPreference
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

+ 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 210.5-02.28)

-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 29

-Article 5

+ Details

Name:	us-gaap_PreferredStockSharesOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Proceeds from issuance of capital stock which provides for a specific dividend that is paid to the shareholders before any dividends to common stockholders and which takes precedence over common stockholders in the event of liquidation.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

+ Details

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

- Definition

Number of new stock issued during the period.

+ 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 SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_SeriesAPreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_SeriesBPreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_SeriesCPreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 11 - Preferred Stock and Warrants (Details) (USD $)	0 Months Ended	12 Months Ended			0 Months Ended	24 Months Ended	0 Months Ended	30 Months Ended	0 Months Ended
	Jun. 14, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Apr. 02, 2016	Mar. 31, 2016	Jul. 14, 2011	Mar. 31, 2014	Oct. 31, 2014	Nov. 18, 2011	Oct. 30, 2014
Note 11 - Preferred Stock and Warrants (Details) [Line Items]
Stock Issued During Period, Shares, New Issues (in Shares)		223,382	563,343	2,864,495
Proceeds from Issuance of Preferred Stock and Preference Stock (in Dollars)		$ 15,300,000
Preferred Stock, Dividend Rate, Percentage	10.00%
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)										423,977
Common Stock Dividend Rate	10.00%egbn_CommonStockDividendRate		10.00%egbn_CommonStockDividendRate
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share)										$ 6.76
Series B Preferred Stock [Member] \| Scenario, Forecast [Member]
Note 11 - Preferred Stock and Warrants (Details) [Line Items]
Preferred Stock, Dividend Rate, Percentage					9.00%	1.00%
Series B Preferred Stock [Member]
Note 11 - Preferred Stock and Warrants (Details) [Line Items]
Stock Issued During Period, Shares, New Issues (in Shares)							56,600
Preferred Stock, Liquidation Preference Per Share (in Dollars per share)		$ 1,000	1,000				$ 1,000				$ 1,000
Proceeds from Issuance of Preferred Stock and Preference Stock (in Dollars)							$ 56,600,000
Preferred Stock, Dividend Rate, Percentage								1.00%
Preferred Stock Redemption Price Percentage		100.00%
Preferred Stock, Shares Outstanding (in Shares)		56,600	56,600
Series A Preferred Stock [Member] \| Virginia Heritage Bank [Member]
Note 11 - Preferred Stock and Warrants (Details) [Line Items]
Preferred Stock, Liquidation Preference Per Share (in Dollars per share)											$ 1,000
Preferred Stock, Shares Outstanding (in Shares)											15,300
Series C Preferred Stock [Member] \| Virginia Heritage Bank [Member]
Note 11 - Preferred Stock and Warrants (Details) [Line Items]
BusinessCombinationSharesPerAcquireesCommonStock (in Dollars per share)											$ 1
Series C Preferred Stock [Member]
Note 11 - Preferred Stock and Warrants (Details) [Line Items]
Preferred Stock, Liquidation Preference Per Share (in Dollars per share)		$ 1,000	1,000								$ 1,000
Preferred Stock, Dividend Rate, Percentage									1.00%
Preferred Stock, Shares Outstanding (in Shares)		15,300	0