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Related Party Transactions (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
EagleBank Foundation |  |  |
Related Party Transaction [Line Items] |  |  |
Donation paid | $ 185 | $ 182 | $ 150

X
- Definition The amount of donation paid to eagle bank foundation. + References No definition available. + Details
Name: | egbn_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty1
Namespace Prefix: | egbn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=egbn_EagleBankFoundationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |