ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY (Troubled Debt Restructuring) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Troubled Debt Restructuring [Abstract]
Accruing troubled debt restructured loans	$ 23,605	$ 22,332
Nonaccrual troubled debt restructured loans	19,607	28,506
Total troubled debt restructured loans	$ 43,212	$ 50,838

Reflects the carrying amount of loans that are not accruing interest with terms that have been modified because of the inability of the borrower, for financial reasons, to comply with the terms of the original loan agreement.

No definition available.

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