Financing Receivable, Number of Loans Sold

No definition available.

Name:	egbn_FinancingReceivableNumberOfLoansSold
Namespace Prefix:	egbn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of interest rate of loans receivable, granted by the company.

+ References

No definition available.

+ Details

Name:	egbn_LoansReceivableInterestRate
Namespace Prefix:	egbn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of borrowers of the company.

+ References

No definition available.

+ Details

Name:	egbn_NumberOfBorrowers
Namespace Prefix:	egbn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of loans for which temporary modifications have been granted as of the reporting date.

+ References

No definition available.

+ Details

Name:	egbn_ShortTermLoanModificationProgramNumberOfLoans
Namespace Prefix:	egbn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Outstanding exposure of loans for which temporary modifications have been granted as of the reporting date.

+ References

No definition available.

+ Details

Name:	egbn_ShortTermLoanModificationProgramOutstandingExposure
Namespace Prefix:	egbn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage of outstanding exposure of loans for which temporary modifications have been granted as of the reporting date to total loan.

+ References

No definition available.

+ Details

Name:	egbn_ShortTermLoanModificationProgramOutstandingExposurePercentage
Namespace Prefix:	egbn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Term of the loans granted by the company, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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

- Definition

Amount of allowance for credit loss on accounts receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5074-111524

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
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-URI http://asc.fasb.org/extlink&oid=121599878&loc=SL82895884-210446

+ Details

Name:	us-gaap_AllowanceForDoubtfulAccountsReceivable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524

+ Details

Name:	us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919230-210447

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522

+ Details

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

- Definition

Represents the number of stores.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfStores
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash inflow associated with the sale of loans receivables arising from the financing of goods and services.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585

+ Details

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

- 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_PropertyPlantAndEquipmentLineItems
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=egbn_PaycheckProtectionProgramLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=us-gaap_BankingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=egbn_LendingCentersMember
Namespace Prefix:
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Summary of Significant Accounting Policies - Narrative (Details) $ in Thousands		3 Months Ended
	May 03, 2021 USD ($) borrower loan	Mar. 31, 2021 USD ($) loan store borrower	Mar. 31, 2020 loan	Dec. 31, 2020 USD ($) loan
Property, Plant and Equipment [Line Items]
Number of temporary loan modifications \| loan		58		36
PPP loans, net		$ 7,424,619		$ 7,650,633
Allowance for credit losses		78
Outstanding exposure		$ 143,000		$ 72,000
Outstanding exposure percentage		1.90%		0.90%
Number of contracts modified in TDR \| loan		0	4
90 Days or More Past Due
Property, Plant and Equipment [Line Items]
Number of contracts modified in TDR \| loan		0
PPP loans
Property, Plant and Equipment [Line Items]
Term of the loans granted		2 years
Interest rate (as a percent)		1.00%
PPP loans, net		$ 565,000
Number of borrowers \| borrower		1,800
PPP loans \| Subsequent Event
Property, Plant and Equipment [Line Items]
PPP loans, net	$ 378,400
Number of borrowers \| borrower	789,000
Number of PPP loans sold \| loan	849
Proceeds from sale of PPP loans	$ 169,000
Banking Services
Property, Plant and Equipment [Line Items]
Number of locations \| store		20
Lending Centers
Property, Plant and Equipment [Line Items]
Number of locations \| store		6