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Commitments and Contingent Liabilities (Details Narrative) - George Mason Sponsorship [Member] $ in Thousands | 12 Months Ended
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Dec. 31, 2018 USD ($)
Termination Option One [Member] |
Increase (Decrease) in Contractual Obligation, Termination Option | $ (3,500)
Termination Option One [Member] | Minimum [Member] |
Contractual Obligation, Option Period | 11 years
Termination Option One [Member] | Maximum [Member] |
Contractual Obligation, Option Period | 15 years
Termination Option Two [Member] |
Increase (Decrease) in Contractual Obligation, Termination Option | $ (3,600)
Termination Option Two [Member] | Minimum [Member] |
Contractual Obligation, Option Period | 16 years
Termination Option Two [Member] | Maximum [Member] |
Contractual Obligation, Option Period | 20 years
Effective June 30, 2025 [Member] |
Option to Terminate | 10 years
Effective June 30, 2030 [Member] |
Option to Terminate | 15 years

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- Definition Represents the option period for a contractual obligation. + References No definition available. + Details
Name: | egbn_ContractualObligationOptionPeriod
Namespace Prefix: | egbn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of increase (decrease) in contractual obligations if the contract is terminated. + References No definition available. + Details
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Namespace Prefix: | egbn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of time, after which, the company has the option to terminate the agreement. + References No definition available. + Details
Name: | egbn_OptionToTerminate
Namespace Prefix: | egbn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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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: |
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Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MinimumMember
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: |

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

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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: |