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

Amount of cash each share of acquiree's common stock would be converted into.

No definition available.

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

Represents one multiplier to calculate the cash each share of acquiree's common stock would be converted into

No definition available.

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

Represents the second multiplier to calculate the cash each share of acquiree's common stock would be converted into

No definition available.

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

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

Represents the numerator to calculate 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_BusinessCombinationSharesPerAcquireesCommonStockNumerator
Namespace Prefix:	egbn_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	egbn_Note2BusinessCombinationsDetailsLineItems
Namespace Prefix:	egbn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

No definition available.

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

Amount of asset recognized arising from contingent consideration in a business combination.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 35

-Paragraph 1

-Subparagraph b

-URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 25

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6411-128476

Name:	us-gaap_BusinessCombinationContingentConsiderationAsset
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Value of the difference between preference in liquidation and the par or stated values of the preferred shares.

No definition available.

Name:	us-gaap_PreferredStockLiquidationPreferenceValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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.

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