Seacoast Banking Corporation of Florida (Parent Company Only) Financial Information - Summary of Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income
Total Interest Income	$ 380,494	$ 284,244	$ 287,035
Interest expense	14,332	8,219	24,292
Other expenses	23,690	16,341	15,835
Income tax benefit	31,629	34,335	22,818
Net Income	106,507	124,403	77,764
Parent Company
Income
Interest/other	897	167	270
Dividends from subsidiary Bank	48,424	47,684	20,230
Total Interest Income	49,321	47,851	20,500
Interest expense	3,090	1,683	2,236
Other expenses	1,023	765	838
Total expenses	4,113	2,448	3,074
Income before income taxes and equity in undistributed income of subsidiaries	45,208	45,403	17,426
Income tax benefit	(675)	(481)	(589)
Income before equity in undistributed income of subsidiaries	45,883	45,884	18,015
Equity in undistributed income of subsidiaries	60,624	78,519	59,749
Net Income	$ 106,507	$ 124,403	$ 77,764