XML 103 R87.htm IDEA: XBRL DOCUMENT
v3.20.4

BORROWINGS - Short-Term Borrowings (Parenthetical) (Details) | 12 Months Ended
--- | ---
Dec. 31, 2020
Federal Home Loan Bank of Indianapolis Advance, 1.61%, Due January 7, 2020 |
Debt Instrument [Line Items] |
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate | 1.61%
Federal Home Loan Bank Advances Branch Of Fhlb Bank Due Dates | Jan. 07, 2019
Federal Home Loan Bank of Indianapolis Putable Advance, 0.39%, Due March 4, 2030 |
Debt Instrument [Line Items] |
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate | 0.39%
Federal Home Loan Bank Advances Branch Of Fhlb Bank Due Dates | Jun. 27, 2018

X
- Definition Discloses the date of maturity, when only one maturity date applies. for the advances from the Federal Home Loan Bank, by branch, as of the Balance Sheet date. + References No definition available. + Details
Name: | lkfn_FederalHomeLoanBankAdvancesBranchOfFhlbBankDueDates
Namespace Prefix: | lkfn_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Discloses the single interest rate [if] applicable to the advances from the Federal Home Loan Bank, by branch, as of the Balance Sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
Name: | us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=lkfn_FederalHomeLoanBankOfIndianapolisNotesOnePointSixOnePercentageDueJanuarySevenTwoThousandTwentyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=lkfn_FederalHomeLoanBankOfIndianapolisPutableAdvanceZeroPointThreeNinePercentageDueMarchFourTwoThousandThirtyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |