| Document and Entity Information | Sep. 09, 2024 |
| Cover [Abstract] | |
| Entity Registrant Name | CAMDEN NATIONAL CORP |
| Amendment Flag | false |
| Entity Central Index Key | 0000750686 |
| Document Type | 8-K |
| Document Period End Date | Sep. 09, 2024 |
| Entity Incorporation State Country Code | ME |
| Entity File Number | 001-13227 |
| Entity Tax Identification Number | 01-0413282 |
| Entity Address, Address Line One | Two Elm Street |
| Entity Address, City or Town | Camden |
| Entity Address, State or Province | ME |
| Entity Address, Postal Zip Code | 04843 |
| City Area Code | (207) |
| Local Phone Number | 236-8821 |
| Written Communications | true |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common stock, without par value |
| Trading Symbol | CAC |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
