Deposits - Time deposit accounts in excess of $250 thousand (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Time deposits $250,000 or more
Three months or less	$ 63,099	$ 51,214	$ 44,348
More than three months through twelve months	197,141	286,300	136,822
Over twelve months	90,361	108,273	98,519
Total	$ 350,601	$ 445,787	$ 279,689

The amount of time deposit accounts in excess of $250 thousand three months through 12 months.

No definition available.

Name:	egbn_TimeDepositAccountsInExcessOf250ThousandThreeMonthsThrough12Months
Namespace Prefix:	egbn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant