Note 5 - Net Income per Common Share (Details)	0 Months Ended
Jun. 14, 2013	Jun. 14, 2013
Earnings Per Share [Abstract]
undefined	10.00%	10.00%

Common stock dividend, percentage of shares issued of shares held.

No definition available.

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