| Cover Page | Nov. 12, 2019 |
| Cover page. | |
| Entity Registrant Name | SEACOAST BANKING CORPORATION OF FLORIDA |
| Document Type | 8-K/A |
| Document Period End Date | Nov. 12, 2019 |
| Entity Incorporation, State or Country Code | FL |
| Entity File Number | 000-13660 |
| Entity Tax Identification Number | 59-2260678 |
| Entity Address, Address Line One | 815 COLORADO AVENUE, |
| Entity Address, City or Town | STUART |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 34994 |
| City Area Code | 772 |
| Local Phone Number | 287-4000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | SBCF |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000730708 |
| Amendment Flag | true |
| Amendment Description | amendment to reference item 7.01 in the EDGAR filing system and furnish exhibit 104 |
