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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

X
- Definition Represents the total amount drawn. + References No definition available. + Details
Name: | lkfn_AmountOfDepositsDrawn
Namespace Prefix: | lkfn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the total amount available to the Bank. + References No definition available. + Details
Name: | lkfn_DepositsAvailableToBank
Namespace Prefix: | lkfn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_DepositsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration