XML 36 R29.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Note 3 - Investment Securities Available-for-Sale (Details) (USD $) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2015 | Dec. 31, 2014 | Mar. 31, 2014
Note 3 - Investment Securities Available-for-Sale (Details) [Line Items] |  |  |
Debt Securities, Weighted Average Duration | 3 years 292 days |  |
Federal Home Loan Bank Stock and Federal Reserve Bank Stock | $ 16,793,000 us-gaap_FederalHomeLoanBankStockAndFederalReserveBankStock | $ 22,560,000 us-gaap_FederalHomeLoanBankStockAndFederalReserveBankStock | $ 10,599,000 us-gaap_FederalHomeLoanBankStockAndFederalReserveBankStock
Available-for-sale Securities Pledged as Collateral | 256,600,000 us-gaap_AvailableForSaleSecuritiesPledgedAsCollateral |  |
Securities Holdings of any One Issuer Exceeding 10% of Shareholders' Equity | $ 0 egbn_SecuritiesHoldingsOfAnyOneIssuerExceedingTenPercentOfShareholdersEquity | $ 0 egbn_SecuritiesHoldingsOfAnyOneIssuerExceedingTenPercentOfShareholdersEquity |
Debt Securities [Member] | Total Investment Securities [Member] | Investment Securities Concentration Risk [Member] |  |  |
Note 3 - Investment Securities Available-for-Sale (Details) [Line Items] |  |  |
Concentration Risk, Percentage | 99.90%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = egbn_TotalInvestmentSecuritiesMember / us-gaap_ConcentrationRiskByTypeAxis = egbn_InvestmentSecuritiesConcentrationRiskMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_DebtSecuritiesMember |  |

X
- Definition Period of time between issuance and maturity of debt securities, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | egbn_DebtSecuritiesWeightedAverageDuration
Namespace Prefix: | egbn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | egbn_Note3InvestmentSecuritiesAvailableforSaleDetailsLineItems
Namespace Prefix: | egbn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Securities held by any one issuer exceeding 10% of shareholders' equity. + References No definition available. + Details
Name: | egbn_SecuritiesHoldingsOfAnyOneIssuerExceedingTenPercentOfShareholdersEquity
Namespace Prefix: | egbn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The fair value of available-for-sale securities that serve as collateral for borrowings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5086-111524 + Details
Name: | us-gaap_AvailableForSaleSecuritiesPledgedAsCollateral
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
Name: | us-gaap_ConcentrationRiskPercentage1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of Federal Home Loan Bank (FHLB) and Federal Reserve Bank stock. + References No definition available. + Details
Name: | us-gaap_FederalHomeLoanBankStockAndFederalReserveBankStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_DebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |