XML 69 R54.htm IDEA: XBRL DOCUMENT
v3.22.4

SECURITIES - Additional Information (Details) - USD ($) | Dec. 31, 2022 | Apr. 01, 2022 | Dec. 31, 2021
--- | --- | --- | ---
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 | $ 22,900,000 | 24,400,000 |
Unrealized loss of held-to-maturity securities transferred from available-for sale, net of tax | 18,100,000 | $ 19,300,000 |
Available-for-sale Securities pledged as collateral | 298,200,000 |  | $ 300,800,000
Debt securities, available-for-sale, allowance for credit loss | 0 |  | 0
Debt securities, held-to-maturity, allowance for credit loss | 0 |  |
Accrued interest receivable on available-for-sale and held-to-maturity debt securities | $ 8,900,000 |  | $ 7,400,000
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-types: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 -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 954 -SubTopic 210 -Section 45 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=120413173&loc=SL6242262-115580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b)(1)(i) -URI https://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 954 -SubTopic 210 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=127002003&loc=SL6242269-115581 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleRestricted
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, excluding accrued interest, of allowance for credit loss on investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 + Details
Name: | us-gaap_DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant