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Note 13. Subsequent Event (Details) - Consumer Portfolio Segment [Member] - USD ($) $ in Thousands | Jul. 24, 2015 | Jun. 30, 2015
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Note 13. Subsequent Event (Details) [Line Items] |  |
Sale of Loan Receivable, Selling Price |  | $ 83,400
Subsequent Event [Member] |  |
Note 13. Subsequent Event (Details) [Line Items] |  |
Sale of Loan Receivable, Estimated Loss | $ (900) |

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- References No definition available. + Details
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Namespace Prefix: | egbn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The estimated loss in merger transaction included an adjustment to the intangible. + References No definition available. + Details
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Namespace Prefix: | egbn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The selling price of the indirect consumer loan portfolio acquired in the Merger under the contract. + References No definition available. + Details
Name: | egbn_SaleOfLoanReceivableSellingPrice
Namespace Prefix: | egbn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |