| Document and Entity Information | Dec. 14, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 14, 2020 |
| Entity Registrant Name | BRIDGE BANCORP, INC. |
| Entity Incorporation, State or Country Code | NY |
| Entity File Number | 001-34096 |
| Entity Tax Identification Number | 11-2934195 |
| Entity Address, Address Line One | PO BOX 3005 |
| Entity Address, City or Town | BRIDGEHAMPTON |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 11932 |
| City Area Code | 631 |
| Local Phone Number | 537-1000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000846617 |
| Title of 12(b) Security | Common Stock, $0.01 Par Value |
| Trading Symbol | BDGE |
| Security Exchange Name | NASDAQ |
