XML 71 R56.htm IDEA: XBRL DOCUMENT
v3.24.0.1

SECURITIES - Additional Information (Details) - USD ($) | Dec. 31, 2023 | Dec. 31, 2022 | Apr. 01, 2022
--- | --- | --- | ---
Information related to available for sale securities |  |  |
Fair value of held-to-maturity securities transferred from available-for sale |  |  | $ 127,000,000
Unrealized loss of held-to-maturity securities transferred from available-for sale | $ 20,900,000 |  | 24,400,000
Unrealized loss of held-to-maturity securities transferred from available-for sale, net of tax | 16,500,000 |  | $ 19,300,000
Available-for-sale Securities pledged as collateral | 792,000,000.0 | $ 298,200,000 |
Debt securities, available-for-sale, allowance for credit loss | 0 | 0 |
Accrued interest receivable on available-for-sale and held-to-maturity debt securities | $ 7,600,000 | $ 8,900,000 |
Securities backed by government or investment grade | 99.00% |  |

X
- Definition Debt Securities, Available-for-Sale And Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss + References No definition available. + Details
Name: | lkfn_DebtSecuritiesAvailableForSaleAndHeldToMaturityAccruedInterestAfterAllowanceForCreditLoss
Namespace Prefix: | lkfn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Debt Securities, Available-for-Sale, Percentage Backed by Government or Investment Grade + References No definition available. + Details
Name: | lkfn_DebtSecuritiesAvailableForSalePercentageBackedByGovernmentOrInvestmentGrade
Namespace Prefix: | lkfn_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Debt Securities, Held-To-Maturity, Transferred From Available-For-Sale, Fair Value + References No definition available. + Details
Name: | lkfn_DebtSecuritiesHeldToMaturityTransferredFromAvailableForSaleFairValue
Namespace Prefix: | lkfn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Debt Securities, Held-To-Maturity, Transferred From Available-For-Sale, Unrealized Loss + References No definition available. + Details
Name: | lkfn_DebtSecuritiesHeldToMaturityTransferredFromAvailableForSaleUnrealizedLoss
Namespace Prefix: | lkfn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Debt Securities, Held-To-Maturity, Transferred From Available-For-Sale, Unrealized Loss, Net of Tax + References No definition available. + Details
Name: | lkfn_DebtSecuritiesHeldToMaturityTransferredFromAvailableForSaleUnrealizedLossNetOfTax
Namespace Prefix: | lkfn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Amount excluding accrued interest, of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479130/326-30-45-1 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of restricted investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (b)(1)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481420/860-30-50-1A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 954 -SubTopic 210 -Name Accounting Standards Codification -Section 45 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480632/954-210-45-4 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 954 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480602/954-210-50-2 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleRestricted
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant