ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY - Troubled Debt Restructuring (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY
Accruing troubled debt restructured loans	$ 5,121	$ 5,237
Nonaccrual troubled debt restructured loans	6,218	6,476
Total troubled debt restructured loans	$ 11,339	$ 11,713

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