DEPOSITS (Summary of Certain Deposits) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Time deposits of $100,000 to $250,000	$ 212,232	$ 248,711
Time deposits of $250,000 or more	712,593	489,543
Public Fund Deposits	1,183,166	891,065
Brokered Deposits	$ 98,177	$ 148,040

The aggregate amount of domestic and foreign time deposit liabilities (including certificates of deposits, individual retirement accounts and open accounts) in denominations of $100,000 to $250,000.

No definition available.

Name:	lkfn_TimeDeposits100000To250000
Namespace Prefix:	lkfn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant