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Note 11 - Net Income per Common Share (Details)	0 Months Ended	12 Months Ended
	Jun. 14, 2013	Dec. 31, 2013
Earnings Per Share [Abstract]
undefined	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

- Details

Name:	us-gaap_EarningsPerShareAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration