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v3.21.1

BASIS OF PRESENTATION (Details) | 3 Months Ended
--- | ---
Mar. 31, 2021 subsidiary
BASIS OF PRESENTATION |
Number of wholly owned subsidiaries | 2

X
- Definition Represents the number of wholly owned subsidiaries. + References No definition available. + Details
Name: | lkfn_NumberOfWhollyOwnedSubsidiaries
Namespace Prefix: | lkfn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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