PARENT COMPANY STATEMENTS - CONDENSED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Condensed Financial Statements, Captions [Line Items]
Other income									$ 9,141	$ 1,874	$ 2,725
Interest expense	$ (42,343)	$ (40,230)	$ (35,958)	$ (27,701)	$ (18,516)	$ (10,066)	$ (4,944)	$ (3,154)	(146,232)	(36,680)	(15,131)
Income tax benefit	(6,436)	(4,479)	(1,880)	(3,771)	(4,987)	(6,237)	(5,584)	(4,539)	(16,566)	(21,347)	(21,711)
NET INCOME	$ 29,626	$ 25,252	$ 14,611	$ 24,278	$ 25,977	$ 28,525	$ 25,673	$ 23,642	93,767	103,817	95,733
COMPREHENSIVE INCOME (LOSS)									127,495	(101,199)	84,082
Reportable Legal Entities | Parent Company
Condensed Financial Statements, Captions [Line Items]
Other income									5	1	3
Interest expense									0	0	(7)
Miscellaneous expense									(4,768)	(8,795)	(8,133)
INCOME BEFORE INCOME TAXES AND EQUITY IN UNDISTRIBUTED INCOME OF SUBSIDIARIES									43,025	33,096	40,253
Income tax benefit									1,957	2,770	2,360
INCOME BEFORE EQUITY IN UNDISTRIBUTED INCOME OF SUBSIDIARIES									44,982	35,866	42,613
Equity in undistributed income of subsidiaries									48,785	67,951	53,120
NET INCOME									93,767	103,817	95,733
COMPREHENSIVE INCOME (LOSS)									127,495	(101,199)	84,082
Reportable Legal Entities | Parent Company | Lake City Bank
Condensed Financial Statements, Captions [Line Items]
Dividends from Lake City Bank, Lakeland Statutory Trust II									46,263	40,590	47,355
Reportable Legal Entities | Parent Company | Non-bank Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Dividends from Lake City Bank, Lakeland Statutory Trust II									$ 1,525	$ 1,300	$ 1,035