DEPOSITS - Narrative (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Deposits [Abstract]
Total amount available to the bank	$ 0	$ 100,000,000.0
Total amount drawn		$ 10,000,000.0

Represents the total amount available to the Bank.

No definition available.

Name:	lkfn_DepositsAvailableToBank
Namespace Prefix:	lkfn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant