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Deposits - Narrative (Details) - USD ($) $ in Billions | Mar. 31, 2024 | Dec. 31, 2023
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Deposits Liabilities, Balance Sheet, Reported Amounts [Abstract] |  |
Brokered deposits, excluding CDARS and ICS Two-Way | $ 4.2 | $ 2.5
Brokered deposits, excluding CDARS and ICS Two-Way, percent of total | 49.10% | 28.80%
Deposits attributable to CDARS and ICS two-way deposits | $ 1.7 |

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- Definition Brokered Deposits Attributable to CDARS and ICS Two-Way Deposits + References No definition available. + Details
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Namespace Prefix: | egbn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Brokered Deposits, Excluding CDARS and ICS Two-Way Deposits + References No definition available. + Details
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Namespace Prefix: | egbn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Brokered Deposits, Excluding CDARS and ICS Two-Way Deposits, Percent of Total Deposits + References No definition available. + Details
Name: | egbn_BrokeredDepositsExcludingCDARSAndICSTwoWayDepositsPercentOfTotalDeposits
Namespace Prefix: | egbn_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

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