Seacoast Banking Corporation of Florida (Parent Company Only) Financial Information - Summary of Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Assets
Other assets	$ 325,485	$ 331,345
Total Assets	15,176,308	14,580,249
Liabilities and Shareholders' Equity
Other liabilities	166,601	164,353
Shareholders' equity	2,183,243	2,108,086	$ 1,607,775	$ 1,310,736
Total Liabilities & Shareholders' Equity	15,176,308	14,580,249
Parent Company
Assets
Cash	96	466
Securities purchased under agreement to resell with subsidiary bank, maturing within 30 days	95,734	101,191
Investment in subsidiaries	2,190,338	2,109,341
Other assets	5,879	4,837
Total Assets	2,292,047	2,215,835
Liabilities and Shareholders' Equity
Long-term debt	106,966	106,302
Other liabilities	1,941	1,551
Shareholders' equity	2,183,140	2,107,982
Total Liabilities & Shareholders' Equity	$ 2,292,047	$ 2,215,835