Deposits - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Deposits Liabilities, Balance Sheet, Reported Amounts [Abstract]
Total brokered deposits	$ 851.5	$ 3,300.0
Percent of total deposits	11.00%	36.00%

Brokered Deposits, Excluding CDARS and ICS Two-Way Deposits, Percent of Total Deposits

No definition available.

Name:	egbn_BrokeredDepositsExcludingCDARSAndICSTwoWayDepositsPercentOfTotalDeposits
Namespace Prefix:	egbn_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant