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PARENT COMPANY STATEMENTS (CONDENSED STATEMENTS OF INCOME) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Other income |  |  |  |  |  |  |  |  | $ 2,381 | $ 2,598 | [1] | $ 2,213 | [1]
Interest expense on subordinated debt | $ (14,138) | $ (12,454) | $ (11,262) | $ (9,845) | $ (8,769) | $ (7,969) | $ (7,002) | $ (6,066) | (47,699) | (29,806) |  | (20,470) |
INCOME BEFORE INCOME TAX EXPENSE |  |  |  |  |  |  |  |  | 98,944 | 89,634 |  | 77,217 |
Income tax benefit | (5,480) | (4,679) | (5,110) | (3,264) | (11,779) | (7,573) | (7,394) | (5,558) | (18,533) | (32,304) |  | (25,133) |
NET INCOME | $ 21,363 | $ 20,570 | $ 20,142 | $ 18,336 | $ 11,627 | $ 15,825 | $ 15,364 | $ 14,514 | 80,411 | 57,330 |  | 52,084 |
COMPREHENSIVE INCOME |  |  |  |  |  |  |  |  | 75,131 | 59,047 |  | 47,555 |
Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Other income |  |  |  |  |  |  |  |  | 171 | 57 |  | 50 |
Interest expense on subordinated debt |  |  |  |  |  |  |  |  | (1,643) | (1,349) |  | (1,190) |
Miscellaneous expense |  |  |  |  |  |  |  |  | (6,422) | (6,491) |  | (5,006) |
INCOME BEFORE INCOME TAX EXPENSE |  |  |  |  |  |  |  |  | 21,049 | 15,069 |  | 15,511 |
Income tax benefit |  |  |  |  |  |  |  |  | 2,795 | 2,688 |  | 2,483 |
INCOME BEFORE EQUITY IN UNDISTRIBUTED INCOME OF SUBSIDIARIES |  |  |  |  |  |  |  |  | 23,844 | 17,757 |  | 17,994 |
Equity in undistributed income of subsidiaries |  |  |  |  |  |  |  |  | 56,567 | 39,573 |  | 34,090 |
NET INCOME |  |  |  |  |  |  |  |  | 80,411 | 57,330 |  | 52,084 |
COMPREHENSIVE INCOME |  |  |  |  |  |  |  |  | 75,131 | 59,047 |  | 47,555 |
Parent Company [Member] | Lake City Bank [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends from Lake City Bank, Lakeland Statutory Trust II |  |  |  |  |  |  |  |  | 27,933 | 21,822 |  | 20,622 |
Parent Company [Member] | Non-bank Subsidiaries [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends from Lake City Bank, Lakeland Statutory Trust II |  |  |  |  |  |  |  |  | $ 1,010 | $ 1,030 |  | $ 1,035 |
[1] | The Company elected the modified retrospective approach of adoption; therefore, prior period balances are presented under legacy GAAP and may not be comparable to current year presentation. As a result of this new standard, the only revenue streams with changes in reporting in the current periods compared to the prior year comparable periods are loan and service fees and other income.

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