| Document and Entity Information Document | Apr. 21, 2021 |
| Entity Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Apr. 21, 2021 |
| Entity Registrant Name | EAGLE BANCORP INC. |
| Entity Central Index Key | 0001050441 |
| Amendment Flag | false |
| Entity Incorporation, State or Country Code | MD |
| Entity File Number | 0-25923 |
| Entity Tax Identification Number | 52-2061461 |
| Entity Address, Address Line One | 7830 Old Georgetown Road, Third Floor |
| Entity Address, City or Town | Bethesda |
| Entity Address, State or Province | MD |
| Entity Address, Postal Zip Code | 20814 |
| City Area Code | 301 |
| Local Phone Number | 986-1800 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.01 par value |
| Trading Symbol | EGBN |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
