Seacoast Banking Corporation of Florida (Parent Company Only) Financial Information - Schedule of Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income
Total Interest Income	$ 836,374	$ 725,559	$ 688,975
Interest expense	282,898	293,588	200,735
Other expenses	26,319	24,322	25,696
Income Before Income Taxes	186,506	155,840	134,252
Income tax benefit	41,628	34,854	30,219
Net Income	144,878	120,986	104,033
Parent Company
Income
Interest/other	2,769	3,547	3,573
Dividends from subsidiary Bank	332,203	59,600	40,655
Total Interest Income	334,972	63,147	44,228
Interest expense	6,629	7,668	7,408
Other expenses	7,552	779	996
Total expenses	14,181	8,447	8,404
Income Before Income Taxes	320,791	54,700	35,824
Income tax benefit	(2,396)	(1,029)	(1,015)
Income before equity in undistributed income of subsidiaries	323,187	55,729	36,839
Equity in undistributed income of subsidiaries	(178,309)	65,257	67,194
Net Income	$ 144,878	$ 120,986	$ 104,033