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Note 14 - Related Party Transactions (Details) (USD $)	12 Months Ended
	Dec. 31, 2014
Director [Member] | Interest [Member]
Note 14 - Related Party Transactions (Details) [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 801,000us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_NatureOfExpenseAxis = egbn_InterestMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_DirectorMember
Limited Liability Company [Member] | Monthly Base Rental [Member]
Note 14 - Related Party Transactions (Details) [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	132,938us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_NatureOfExpenseAxis = egbn_MonthlyBaseRentalMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_LimitedLiabilityCompanyMember
Limited Liability Company A [Member]
Note 14 - Related Party Transactions (Details) [Line Items]
Ownership Interest in Trust	85.00%egbn_OwnershipInterestInTrust / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = egbn_LimitedLiabilityCompanyAMember
Limited Liability Company B [Member]
Note 14 - Related Party Transactions (Details) [Line Items]
Ownership Interest in Trust	51.00%egbn_OwnershipInterestInTrust / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = egbn_LimitedLiabilityCompanyBMember
Mr Rogers [Member]
Note 14 - Related Party Transactions (Details) [Line Items]
Related Party Transaction, Amounts of Transaction	$ 907,603us-gaap_RelatedPartyTransactionAmountsOfTransaction / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = egbn_MrRogersMember

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- Definition

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+ References

No definition available.

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- Definition

Amount of transactions with related party during the financial reporting period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

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- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

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