Other Real Estate Owned - Narrative (Details) - property	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Real Estate [Abstract]
Number of properties in foreclosure	0
OREO, Properties sold	1	0

Other Real Estate Disposals, Number of Properties Sold

No definition available.

Name:	egbn_OtherRealEstateDisposalsNumberOfPropertiesSold
Namespace Prefix:	egbn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration