PARENT COMPANY STATEMENTS (CONDENSED BALANCE SHEETS) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
ASSETS
Other assets	$ 31,153	$ 28,446
Total assets	4,290,025	3,766,286
LIABILITIES
Subordinated debt	30,928	30,928
STOCKHOLDERS' EQUITY	426,978	392,812	$ 361,296	$ 321,875
Total liabilities and stockholders' equity	4,290,025	3,766,286
Parent Company [Member]
ASSETS
Deposits with Lake City Bank	3,467	712
Deposits with other depository institutions	4,636	3,623
Cash	8,103	4,335
Investments in banking subsidiary	441,389	411,883
Investments in other subsidiaries	3,471	3,429
Other assets	5,206	4,329
Total assets	458,169	423,976
LIABILITIES
Dividends payable and other liabilities	263	236
Subordinated debt	30,928	30,928
STOCKHOLDERS' EQUITY	426,978	392,812
Total liabilities and stockholders' equity	$ 458,169	$ 423,976