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Note 1 - Summary of Significant Accounting Policies (Details) (USD $)	0 Months Ended	12 Months Ended
	Jun. 14, 2013	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2012
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
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Trading Securities			0us-gaap_TradingSecurities
Held-to-maturity Securities			0us-gaap_HeldToMaturitySecurities
Deferred Tax Assets, Valuation Allowance		0us-gaap_DeferredTaxAssetsValuationAllowance	0us-gaap_DeferredTaxAssetsValuationAllowance
Common Stock Dividend Rate	10.00%egbn_CommonStockDividendRate	10.00%egbn_CommonStockDividendRate
Furniture and Fixtures [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life			7 years
Computer Software, Intangible Asset [Member] | Maximum [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life			5 years
Building and Building Improvements [Member] | Minimum [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life			10 years
Building and Building Improvements [Member] | Maximum [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life			40 years
Banking Services [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Number of Stores			22us-gaap_NumberOfStores / us-gaap_ProductOrServiceAxis = egbn_BankingServicesMember
Lending Services [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Number of Stores			5us-gaap_NumberOfStores / us-gaap_ProductOrServiceAxis = egbn_LendingServicesMember
Servicing Contracts [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Other Intangible Assets, Net		0us-gaap_OtherIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember	0us-gaap_OtherIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember
Computer Software, Intangible Asset [Member] | Minimum [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life			3 years
Risk Level, High [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Interest Income, Other		0us-gaap_InterestIncomeOther / us-gaap_InternalCreditAssessmentAxis = us-gaap_RiskLevelHighMember	0us-gaap_InterestIncomeOther / us-gaap_InternalCreditAssessmentAxis = us-gaap_RiskLevelHighMember	0us-gaap_InterestIncomeOther / us-gaap_InternalCreditAssessmentAxis = us-gaap_RiskLevelHighMember
Loans Receivable, Net		$ 6,200,000us-gaap_LoansReceivableNet / us-gaap_InternalCreditAssessmentAxis = us-gaap_RiskLevelHighMember	7,400,000us-gaap_LoansReceivableNet / us-gaap_InternalCreditAssessmentAxis = us-gaap_RiskLevelHighMember
Minimum [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Loan Period			30 days
Maximum [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Loan Period			90 days

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

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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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.

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