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Deposits - Narrative (Details) - USD ($) $ in Billions | Sep. 30, 2025 | Dec. 31, 2024
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Deposits Liabilities, Balance Sheet, Reported Amounts [Abstract] |  |
Total brokered deposits | $ 3.5 | $ 4.0
Percent of total deposits | 37.00% | 44.00%

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- Definition Brokered Deposits, Excluding CDARS And ICS Two-Way Deposits + References No definition available. + Details
Name: | egbn_BrokeredDepositsExcludingCDARSAndICSTwoWayDeposits
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-types: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