ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY - Trouble Debt Restructurings (Details) $ in Thousands	Dec. 31, 2021 USD ($)
ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY
Accruing troubled debt restructured loans	$ 5,121
Nonaccrual troubled debt restructured loans	6,218
Total troubled debt restructured loans	$ 11,339

The amount related to financing receivables that have been modified by troubled debt restructurings.

No definition available.

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