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Summary of Significant Accounting Policies (Details Narrative) $ in Thousands	12 Months Ended
	Dec. 31, 2018 Number	Dec. 31, 2017 USD ($)
Banking Services [Member]
Number of locations	20
Lending Services [Member]
Number of locations	5
Minimum [Member]
Days from commitment to closing	30 days
Maximum [Member]
Days from commitment to closing	90 days
Furniture Fixtures and Equipment [Member] | Minimum [Member]
Property, plant and equipment, useful life	3 years
Furniture Fixtures and Equipment [Member] | Maximum [Member]
Property, plant and equipment, useful life	7 years
Computer Software and Hardware [Member] | Minimum [Member]
Property, plant and equipment, useful life	3 years
Computer Software and Hardware [Member] | Maximum [Member]
Property, plant and equipment, useful life	5 years
Building Improvements [Member] | Minimum [Member]
Property, plant and equipment, useful life	5 years
Building Improvements [Member] | Maximum [Member]
Property, plant and equipment, useful life	20 years
Risk Level, High [Member] | Eagle Commercial Ventures, LLC [Member]
Loans receivable, net | $		$ 7,700

X

- Definition

The period of time between issuance of a loan commitment to the customer and closing and sale of the loan to an investor.

+ References

No definition available.

+ Details

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Namespace Prefix:	egbn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes loans held for sale. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7(a))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Represents the number of stores.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
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X

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
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X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
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- Details

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Namespace Prefix:
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Balance Type:
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X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: