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Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis (USD $)	Dec. 31, 2014	Dec. 31, 2013
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	$ 35,945,000us-gaap_ImpairedFinancingReceivableRecordedInvestment	$ 32,646,000us-gaap_ImpairedFinancingReceivableRecordedInvestment
Derivative liabilites	250,000us-gaap_DerivativeLiabilities	0us-gaap_DerivativeLiabilities
Commercial Loan [Member] | Fair Value, Inputs, Level 2 [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	781,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember	4,367,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
Commercial Loan [Member] | Fair Value, Inputs, Level 3 [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	7,171,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember	1,089,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
Commercial Loan [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	12,975,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember	6,779,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
Commercial Loan [Member] | Estimate of Fair Value Measurement [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	7,952,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember	5,456,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
Commercial Real Estate Investment [Member] | Fair Value, Inputs, Level 2 [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	703,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FinancialInstrumentAxis = egbn_CommercialRealEstateInvestmentMember	2,806,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FinancialInstrumentAxis = egbn_CommercialRealEstateInvestmentMember
Commercial Real Estate Investment [Member] | Fair Value, Inputs, Level 3 [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	1,199,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FinancialInstrumentAxis = egbn_CommercialRealEstateInvestmentMember	1,998,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FinancialInstrumentAxis = egbn_CommercialRealEstateInvestmentMember
Commercial Real Estate Investment [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	10,494,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = egbn_CommercialRealEstateInvestmentMember	5,902,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = egbn_CommercialRealEstateInvestmentMember
Commercial Real Estate Investment [Member] | Estimate of Fair Value Measurement [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	1,902,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_FinancialInstrumentAxis = egbn_CommercialRealEstateInvestmentMember	4,804,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_FinancialInstrumentAxis = egbn_CommercialRealEstateInvestmentMember
Commercial Real Estate Owner Occupied [Member] | Fair Value, Inputs, Level 2 [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans		2,712,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FinancialInstrumentAxis = egbn_CommercialRealEstateOwnerOccupiedMember
Commercial Real Estate Owner Occupied [Member] | Fair Value, Inputs, Level 3 [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	824,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FinancialInstrumentAxis = egbn_CommercialRealEstateOwnerOccupiedMember	887,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FinancialInstrumentAxis = egbn_CommercialRealEstateOwnerOccupiedMember
Commercial Real Estate Owner Occupied [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	1,889,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = egbn_CommercialRealEstateOwnerOccupiedMember	5,452,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = egbn_CommercialRealEstateOwnerOccupiedMember
Commercial Real Estate Owner Occupied [Member] | Estimate of Fair Value Measurement [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	824,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_FinancialInstrumentAxis = egbn_CommercialRealEstateOwnerOccupiedMember	3,599,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_FinancialInstrumentAxis = egbn_CommercialRealEstateOwnerOccupiedMember
Residential Mortgage [Member] | Fair Value, Inputs, Level 2 [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans		86,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FinancialInstrumentAxis = us-gaap_ResidentialMortgageMember
Residential Mortgage [Member] | Fair Value, Inputs, Level 3 [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	346,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FinancialInstrumentAxis = us-gaap_ResidentialMortgageMember	774,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FinancialInstrumentAxis = us-gaap_ResidentialMortgageMember
Residential Mortgage [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	346,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_ResidentialMortgageMember	887,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_ResidentialMortgageMember
Residential Mortgage [Member] | Estimate of Fair Value Measurement [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	346,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_FinancialInstrumentAxis = us-gaap_ResidentialMortgageMember	860,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_FinancialInstrumentAxis = us-gaap_ResidentialMortgageMember
Home Equity Line of Credit [Member] | Fair Value, Inputs, Level 2 [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	5,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember	50,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember
Home Equity Line of Credit [Member] | Fair Value, Inputs, Level 3 [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	963,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember	47,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember
Home Equity Line of Credit [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	1,398,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember	623,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember
Home Equity Line of Credit [Member] | Estimate of Fair Value Measurement [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	968,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember	97,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember
Consumer, Other [Member] | Fair Value, Inputs, Level 3 [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	13,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FinancialInstrumentAxis = egbn_ConsumerOtherMember	2,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FinancialInstrumentAxis = egbn_ConsumerOtherMember
Consumer, Other [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	58,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = egbn_ConsumerOtherMember	70,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = egbn_ConsumerOtherMember
Consumer, Other [Member] | Estimate of Fair Value Measurement [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	13,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_FinancialInstrumentAxis = egbn_ConsumerOtherMember	2,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_FinancialInstrumentAxis = egbn_ConsumerOtherMember
Construction Loans [Member] | Fair Value, Inputs, Level 2 [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans		4,228,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_LongtermDebtTypeAxis = us-gaap_ConstructionLoansMember
Construction Loans [Member] | Fair Value, Inputs, Level 3 [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	3,297,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_LongtermDebtTypeAxis = us-gaap_ConstructionLoansMember	7,080,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_LongtermDebtTypeAxis = us-gaap_ConstructionLoansMember
Construction Loans [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	8,785,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_LongtermDebtTypeAxis = us-gaap_ConstructionLoansMember	12,933,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_LongtermDebtTypeAxis = us-gaap_ConstructionLoansMember
Construction Loans [Member] | Estimate of Fair Value Measurement [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	3,297,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConstructionLoansMember	11,308,000us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConstructionLoansMember
Fair Value, Inputs, Level 2 [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Other real estate owned	9,184,000us-gaap_OtherRealEstateAndForeclosedAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member	9,225,000us-gaap_OtherRealEstateAndForeclosedAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Total assets measured at fair value on a nonrecurring basis	10,673,000us-gaap_AssetsFairValueDisclosureNonrecurring / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member	23,474,000us-gaap_AssetsFairValueDisclosureNonrecurring / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Fair Value, Inputs, Level 3 [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Other real estate owned	4,040,000us-gaap_OtherRealEstateAndForeclosedAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Derivative liabilites	250,000us-gaap_DerivativeLiabilities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Total assets measured at fair value on a nonrecurring basis	18,103,000us-gaap_AssetsFairValueDisclosureNonrecurring / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member	11,877,000us-gaap_AssetsFairValueDisclosureNonrecurring / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Estimate of Fair Value Measurement [Member]
Note 22 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Other real estate owned	13,224,000us-gaap_OtherRealEstateAndForeclosedAssets / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember	9,225,000us-gaap_OtherRealEstateAndForeclosedAssets / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember
Derivative liabilites	250,000us-gaap_DerivativeLiabilities / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember
Total assets measured at fair value on a nonrecurring basis	$ 28,776,000us-gaap_AssetsFairValueDisclosureNonrecurring / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember	$ 35,351,000us-gaap_AssetsFairValueDisclosureNonrecurring / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember

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This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

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