Seacoast Banking Corporation of Florida (Parent Company Only) Financial Information - Summary of Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income
Total Interest Income	$ 725,559	$ 688,975	$ 380,494
Interest expense	293,588	200,735	14,332
Other expenses	24,322	29,155	23,690
Income Before Income Taxes	155,840	134,252	138,136
Income tax benefit	34,854	30,219	31,629
Net Income	120,986	104,033	106,507
Parent Company
Income
Interest/other	3,547	3,573	897
Dividends from subsidiary Bank	59,600	40,655	48,424
Total Interest Income	63,147	44,228	49,321
Interest expense	7,668	7,408	3,090
Other expenses	779	996	1,023
Total expenses	8,447	8,404	4,113
Income Before Income Taxes	54,700	35,824	45,208
Income tax benefit	(1,029)	(1,015)	(675)
Income before equity in undistributed income of subsidiaries	55,729	36,839	45,883
Equity in undistributed income of subsidiaries	65,257	67,194	60,624
Net Income	$ 120,986	$ 104,033	$ 106,507