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Note 25 - Quarterly Results of Operations (Unaudited) (Details) |  | 12 Months Ended
--- | --- | ---
Jun. 14, 2013 | Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract] |  |
| 10.00% | 10.00%

X
- Definition Common stock dividend, percentage of shares issued of shares held. + References No definition available. + Details
Name: | egbn_CommonStockDividendRate
Namespace Prefix: | egbn_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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