$LKFN
LAKELAND FINANCIAL CORP Stock $lkfn

$lkfn Overview Financials Valuation SEC Filings Company Website

2018 Form 10-K Financial Statement

#000072199419000011 Filed on February 28, 2019

Income Statement

Concept	2018	2017 Q4	2017 Q3
Revenue	$199.0M	$44.16M	$42.59M
YoY Change	20.08%	21.63%	21.41%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$5.654M	$1.400M	$1.300M
YoY Change	10.45%	27.27%	18.18%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$47.70M	$8.769M	$7.969M
YoY Change	60.03%	62.39%	48.68%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$98.94M	$23.41M	$23.40M
YoY Change	10.39%	16.47%	17.11%
Income Tax	$18.53M	$11.78M	$7.573M
% Of Pretax Income	18.73%	50.32%	32.37%
Net Earnings	$80.41M	$11.63M	$15.83M
YoY Change	40.26%	-14.01%	17.4%
Net Earnings / Revenue	40.41%	26.33%	37.16%
Basic Earnings Per Share	$3.18	$0.46	$0.63
Diluted Earnings Per Share	$3.13	$0.45	$0.62
COMMON SHARES
Basic Shares Outstanding	25.29M		25.19M shares
Diluted Shares Outstanding	25.73M		25.66M shares

Balance Sheet

Concept	2018	2017 Q4	2017 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents		$176.2M	$129.8M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$58.10M	$56.47M	$56.40M
YoY Change	2.83%	8.38%	8.05%
Goodwill		$4.970M
YoY Change		0.0%
Intangibles
YoY Change
Long-Term Investments		$5.300M
YoY Change		3.92%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$4.875B	$4.683B	$4.454B
YoY Change	4.11%	9.16%	6.12%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$10.40M	$6.300M	$5.400M
YoY Change	65.08%	10.53%	5.88%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$75.60M	$70.70M	$63.90M
YoY Change	6.93%	-69.27%	6.15%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$10.40M	$6.300M	$5.400M
YoY Change	65.08%	10.53%	5.88%
LONG-TERM LIABILITIES
Long-Term Debt	$30.90M	$30.90M	$30.90M
YoY Change	0.0%	0.0%	0.0%
Other Long-Term Liabilities	$22.60M	$17.70M	$17.40M
YoY Change	27.68%	-3.8%	-19.82%
Total Long-Term Liabilities	$53.50M	$48.60M	$48.30M
YoY Change	10.08%	-1.42%	-8.17%
TOTAL LIABILITIES
Total Short-Term Liabilities	$10.40M	$6.300M	$5.400M
Total Long-Term Liabilities	$53.50M	$48.60M	$48.30M
Total Liabilities	$4.354B	$4.214B	$3.992B
YoY Change	3.3%	9.1%	5.88%
SHAREHOLDERS EQUITY
Retained Earnings		$363.8M
YoY Change		10.96%
Common Stock		$108.9M
YoY Change		4.27%
Preferred Stock
YoY Change
Treasury Stock (at cost)		$3.408M
YoY Change		16.99%
Treasury Stock Shares		$169.0K	168.2K shares
Shareholders Equity	$521.6M	$468.7M	$462.4M
YoY Change
Total Liabilities & Shareholders Equity	$4.875B	$4.683B	$4.454B
YoY Change	4.11%	9.16%	6.12%

Cashflow Statement

Concept	2018	2017 Q4	2017 Q3
OPERATING ACTIVITIES
Net Income	$80.41M	$11.63M	$15.83M
YoY Change	40.26%	-14.01%	17.4%
Depreciation, Depletion And Amortization	$5.654M	$1.400M	$1.300M
YoY Change	10.45%	27.27%	18.18%
Cash From Operating Activities	$105.0M	$24.10M	$17.20M
YoY Change	35.9%	89.76%	17.01%
INVESTING ACTIVITIES
Capital Expenditures	$7.968M	-$1.500M	-$1.300M
YoY Change	-16.84%	25.0%	-68.29%
Acquisitions
YoY Change
Other Investing Activities	-$158.5M	-$192.2M	-$64.40M
YoY Change	-58.99%	-10.14%	-27.64%
Cash From Investing Activities	-$166.4M	-$193.7M	-$65.70M
YoY Change	-57.97%	-9.95%	-29.43%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$463.0K
YoY Change	-6.46%
Debt Paid & Issued, Net	$80.03M
YoY Change	-70.9%
Cash From Financing Activities	102.2M	215.8M	41.00M
YoY Change	-68.81%	136.11%	-83.46%
NET CHANGE
Cash From Operating Activities	105.0M	24.10M	17.20M
Cash From Investing Activities	-166.4M	-193.7M	-65.70M
Cash From Financing Activities	102.2M	215.8M	41.00M
Net Change In Cash	40.74M	46.20M	-7.500M
YoY Change	357.78%	-141.62%	-104.42%
FREE CASH FLOW
Cash From Operating Activities	$105.0M	$24.10M	$17.20M
Capital Expenditures	$7.968M	-$1.500M	-$1.300M
Free Cash Flow	$97.01M	$25.60M	$18.50M
YoY Change	43.37%	84.17%	-1.6%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2018Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	24632000
CY2017Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	35778000
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	216922000
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	176180000
CY2018Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	585549000
CY2017Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	538493000
CY2018Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group Commercial Real Estate LoansReceivableHeldForSaleNetNotPartOfDisposalGroupCommercialRealEstate	2293000
CY2017Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group Commercial Real Estate LoansReceivableHeldForSaleNetNotPartOfDisposalGroupCommercialRealEstate	3346000
CY2018Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	3866292000
CY2018Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	77106000
CY2017Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	75879000
CY2018Q4	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	13772000
CY2017Q4	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	13772000
CY2018Q4	us-gaap	Interest Receivable InterestReceivable	15518000
CY2017Q4	us-gaap	Interest Receivable InterestReceivable	14093000
CY2018Q4	us-gaap	Goodwill Goodwill	4970000
CY2017Q4	us-gaap	Goodwill Goodwill	4970000
CY2018Q4	us-gaap	Other Assets OtherAssets	34735000
CY2017Q4	us-gaap	Other Assets OtherAssets	28439000
CY2018Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	3097227000
CY2017Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	3123033000
CY2018Q4	us-gaap	Federal Home Loan Bank Borrowings Fair Value Disclosure FederalHomeLoanBankBorrowingsFairValueDisclosure	170000000
CY2017Q4	us-gaap	Federal Home Loan Bank Borrowings Fair Value Disclosure FederalHomeLoanBankBorrowingsFairValueDisclosure	80030000
CY2018Q4	us-gaap	Subordinated Debt SubordinatedDebt	30928000
CY2017Q4	us-gaap	Subordinated Debt SubordinatedDebt	30928000
CY2018Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	276483000
CY2017Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	181610000
CY2018Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	10404000
CY2017Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	6311000
CY2018Q4	us-gaap	Other Liabilities OtherLiabilities	22598000
CY2017Q4	us-gaap	Other Liabilities OtherLiabilities	17733000
CY2018Q4	us-gaap	Liabilities Liabilities	4353550000
CY2017Q4	us-gaap	Liabilities Liabilities	4214309000
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2017Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	112383000
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	108862000
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	419179000
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	363794000
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-6191000
CY2018Q4	us-gaap	Treasury Stock Value TreasuryStockValue	3756000
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	3408000
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	521615000
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	468578000
CY2018Q4	us-gaap	Minority Interest MinorityInterest	89000
CY2017Q4	us-gaap	Minority Interest MinorityInterest	89000
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	521704000
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	468667000
CY2018	lkfn	Interest And Fee Income Nontaxable InterestAndFeeIncomeNontaxable	814000
CY2017	lkfn	Interest And Fee Income Nontaxable InterestAndFeeIncomeNontaxable	729000
CY2016	lkfn	Interest And Fee Income Nontaxable InterestAndFeeIncomeNontaxable	462000
CY2018	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	9717000
CY2017	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	9218000
CY2016	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	9421000
CY2018	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	6079000
CY2017	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	5102000
CY2016	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	3885000
CY2018	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	909000
CY2017	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	354000
CY2016	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	353000
CY2018	us-gaap	Professional Fees ProfessionalFees	3798000
CY2018	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	198970000
CY2017	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	165698000
CY2016	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	138951000
CY2018	us-gaap	Interest Expense Deposits InterestExpenseDeposits	44913000
CY2017	us-gaap	Interest Expense Deposits InterestExpenseDeposits	27026000
CY2016	us-gaap	Interest Expense Deposits InterestExpenseDeposits	18944000
CY2018	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	1143000
CY2017	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	1446000
CY2016	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	352000
CY2018	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	1643000
CY2017	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	1334000
CY2016	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	1174000
CY2018	us-gaap	Interest Expense InterestExpense	47699000
CY2017	us-gaap	Interest Expense InterestExpense	29806000
CY2016	us-gaap	Interest Expense InterestExpense	20470000
CY2018	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	151271000
CY2017	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	135892000
CY2016	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	118481000
CY2018	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	6400000
CY2017	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	3000000
CY2016	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	1150000
CY2018	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	144871000
CY2017	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	132892000
CY2016	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	117331000
CY2018	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	6344000
CY2017	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	5481000
CY2016	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	4805000
CY2018	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	1458000
CY2017	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	1273000
CY2016	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	1010000
CY2018	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1244000
CY2017	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1768000
CY2016	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1392000
CY2018	us-gaap	Noninterest Income Other NoninterestIncomeOther	2381000
CY2017	us-gaap	Noninterest Income Other NoninterestIncomeOther	2598000
CY2016	us-gaap	Noninterest Income Other NoninterestIncomeOther	2213000
CY2018	us-gaap	Labor And Related Expense LaborAndRelatedExpense	48353000
CY2017	us-gaap	Labor And Related Expense LaborAndRelatedExpense	45306000
CY2016	us-gaap	Labor And Related Expense LaborAndRelatedExpense	41656000
CY2018	us-gaap	Occupancy Net OccupancyNet	5149000
CY2017	us-gaap	Occupancy Net OccupancyNet	4595000
CY2016	us-gaap	Occupancy Net OccupancyNet	4266000
CY2018	us-gaap	Equipment Expense EquipmentExpense	5243000
CY2017	us-gaap	Equipment Expense EquipmentExpense	4629000
CY2016	us-gaap	Equipment Expense EquipmentExpense	3850000
CY2018	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	9685000
CY2017	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	8233000
CY2016	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	8148000
CY2018	lkfn	Corporate And Business Development Expense CorporateAndBusinessDevelopmentExpense	5066000
CY2017	lkfn	Corporate And Business Development Expense CorporateAndBusinessDevelopmentExpense	4744000
CY2016	lkfn	Corporate And Business Development Expense CorporateAndBusinessDevelopmentExpense	3328000
CY2018	lkfn	Regulatory Fees And Federal Deposit Insurance Corporation Insurance RegulatoryFeesAndFederalDepositInsuranceCorporationInsurance	1701000
CY2017	lkfn	Regulatory Fees And Federal Deposit Insurance Corporation Insurance RegulatoryFeesAndFederalDepositInsuranceCorporationInsurance	1798000
CY2016	lkfn	Regulatory Fees And Federal Deposit Insurance Corporation Insurance RegulatoryFeesAndFederalDepositInsuranceCorporationInsurance	2001000
CY2018Q4	lkfn	Accrued Interest On Loans AccruedInterestOnLoans	11800000
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1717000
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	59047000
CY2017	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	21409000
CY2017Q4	lkfn	Accrued Interest On Loans AccruedInterestOnLoans	11000000
CY2018Q4	us-gaap	Notes Receivable Net NotesReceivableNet	250000
CY2018Q4	us-gaap	Equity Method Investments EquityMethodInvestments	7000000
CY2017Q4	us-gaap	Equity Method Investments EquityMethodInvestments	5300000
CY2018Q4	us-gaap	Cash Available For Distributions CashAvailableForDistributions	2100000
CY2017Q4	us-gaap	Cash Available For Distributions CashAvailableForDistributions	1000000
CY2017	us-gaap	Professional Fees ProfessionalFees	3574000
CY2016	us-gaap	Professional Fees ProfessionalFees	3208000
CY2018	us-gaap	Other Noninterest Expense OtherNoninterestExpense	7042000
CY2017	us-gaap	Other Noninterest Expense OtherNoninterestExpense	6388000
CY2016	us-gaap	Other Noninterest Expense OtherNoninterestExpense	6521000
CY2018	us-gaap	Noninterest Expense NoninterestExpense	86037000
CY2017	us-gaap	Noninterest Expense NoninterestExpense	79267000
CY2016	us-gaap	Noninterest Expense NoninterestExpense	72978000
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	98944000
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	89634000
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	77217000
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	18533000
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	32304000
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	25133000
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-4529000
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	47555000
CY2016	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	18213000
CY2016	lkfn	Treasury Shares Purchased Deferred Directors Plan TreasurySharesPurchasedDeferredDirectorsPlan	0
CY2016	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-614000
CY2016	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	4210000
CY2017	lkfn	Treasury Shares Purchased Deferred Directors Plan TreasurySharesPurchasedDeferredDirectorsPlan	0
CY2017	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	1736000
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	5698000
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-5280000
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	75131000
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	25291000
CY2018	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	2435000
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	5608000
CY2018Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	316000
CY2017Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	40000
CY2018Q4	lkfn	Mortgage Loans On Real Estate Carrying Value MortgageLoansOnRealEstateCarryingValue	3300000
CY2017Q4	lkfn	Mortgage Loans On Real Estate Carrying Value MortgageLoansOnRealEstateCarryingValue	3000000
CY2018Q4	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	343500000
CY2017Q4	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	344400000
CY2018Q4	us-gaap	Escrow Deposit EscrowDeposit	1600000
CY2017Q4	us-gaap	Escrow Deposit EscrowDeposit	1500000
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CY2016	us-gaap	Contractually Specified Servicing Fees Amount ContractuallySpecifiedServicingFeesAmount	987000
CY2018Q4	lkfn	Treasury Stock Share TreasuryStockShare	172959
CY2017Q4	lkfn	Treasury Stock Share TreasuryStockShare	168970
CY2018Q4	lkfn	Cash On Hand Or On Deposit Requirement CashOnHandOrOnDepositRequirement	6400000
CY2017Q4	lkfn	Cash On Hand Or On Deposit Requirement CashOnHandOrOnDepositRequirement	10500000
CY2018Q4	us-gaap	Mortgage Backed Securities Available For Sale Fair Value Disclosure MortgageBackedSecuritiesAvailableForSaleFairValueDisclosure	363553000
CY2018Q4	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	164700000
CY2017Q4	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	171100000
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	22363000
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	22522000
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	32702000
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	32656000
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	165788000
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	164277000
CY2018Q4	lkfn	Available For Sale Securities With Maturities Amortized Cost AvailableForSaleSecuritiesWithMaturitiesAmortizedCost	223393000
CY2018Q4	lkfn	Available For Sale Securities With Maturities Fair Value AvailableForSaleSecuritiesWithMaturitiesFairValue	221996000
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	368228000
CY2017	us-gaap	Income Tax Reconciliation Deductions Other IncomeTaxReconciliationDeductionsOther	619000
CY2018Q4	lkfn	Number Of Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosurem Number Of Positions Less Than12 Months NumberOfAvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosuremNumberOfPositionsLessThan12Months	40
CY2018Q4	lkfn	Number Of Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosurem Number Of Positions12 Months Or More NumberOfAvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosuremNumberOfPositions12MonthsOrMore	207
CY2018Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	247
CY2017Q4	lkfn	Number Of Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosurem Number Of Positions Less Than12 Months NumberOfAvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosuremNumberOfPositionsLessThan12Months	69
CY2017Q4	lkfn	Number Of Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosurem Number Of Positions12 Months Or More NumberOfAvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosuremNumberOfPositions12MonthsOrMore	84
CY2017Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	153
CY2018Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	3916326000
CY2017Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	3819525000
CY2018Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	1581000
CY2017Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	1066000
CY2018Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	586000
CY2017Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	47000
CY2018	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	6111000
CY2018	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	1043000
CY2018	lkfn	Allowance For Loan And Lease Losses Write Offs After Recoveries AllowanceForLoanAndLeaseLossesWriteOffsAfterRecoveries	5068000
CY2017	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	1560000
CY2017	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	1963000
CY2017	lkfn	Allowance For Loan And Lease Losses Write Offs After Recoveries AllowanceForLoanAndLeaseLossesWriteOffsAfterRecoveries	-403000
CY2016	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	2055000
CY2016	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	1013000
CY2016	lkfn	Allowance For Loan And Lease Losses Write Offs After Recoveries AllowanceForLoanAndLeaseLossesWriteOffsAfterRecoveries	1042000
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	38424000
CY2018Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	3888028000
CY2018	lkfn	Potential Cash Payments Under Employment Agreements PotentialCashPaymentsUnderEmploymentAgreements	5300000
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2017	lkfn	Noncash Nonoperating And Nonrecurring Income Tax Provision NoncashNonoperatingAndNonrecurringIncomeTaxProvision	4100000
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	707000
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-199000
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	268000
CY2018	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	-408000
CY2017	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	4137000
CY2016	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	0
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1462000
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1559000
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1086000
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-99000
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-257000
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	30000
CY2018	lkfn	Interest Income Securitie Tax Exempt InterestIncomeSecuritieTaxExempt	1434000
CY2017	lkfn	Interest Income Securitie Tax Exempt InterestIncomeSecuritieTaxExempt	2015000
CY2016	lkfn	Interest Income Securitie Tax Exempt InterestIncomeSecuritieTaxExempt	1498000
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	165000
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	193000
CY2016	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	190000
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1077000
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	846000
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	726000
CY2018	lkfn	Income Tax Reconciliation Deductions Captive Insurance Premium Income IncomeTaxReconciliationDeductionsCaptiveInsurancePremiumIncome	292000
CY2017	lkfn	Income Tax Reconciliation Deductions Captive Insurance Premium Income IncomeTaxReconciliationDeductionsCaptiveInsurancePremiumIncome	378000
CY2016	lkfn	Income Tax Reconciliation Deductions Captive Insurance Premium Income IncomeTaxReconciliationDeductionsCaptiveInsurancePremiumIncome	361000
CY2018	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	412000
CY2017	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	326000
CY2016	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	311000
CY2018	us-gaap	Income Tax Reconciliation Deductions Other IncomeTaxReconciliationDeductionsOther	303000
CY2017	lkfn	Effective Income Tax Rate Reconciliation Deduction Long Term Incentive Plan Amount EffectiveIncomeTaxRateReconciliationDeductionLongTermIncentivePlanAmount	854000
CY2016	lkfn	Effective Income Tax Rate Reconciliation Deduction Long Term Incentive Plan Amount EffectiveIncomeTaxRateReconciliationDeductionLongTermIncentivePlanAmount	0
CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-408000
CY2016	us-gaap	Income Tax Reconciliation Deductions Other IncomeTaxReconciliationDeductionsOther	554000
CY2018	lkfn	Effective Income Tax Rate Reconciliation Deduction Long Term Incentive Plan Amount EffectiveIncomeTaxRateReconciliationDeductionLongTermIncentivePlanAmount	641000
CY2017	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	4137000
CY2016	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	0
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	3000
CY2017	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-52000
CY2016	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-85000
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	1188000
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	1028000
CY2018Q4	lkfn	Deferred Tax Assets Nonaccrual Loan Interest DeferredTaxAssetsNonaccrualLoanInterest	937000
CY2017Q4	lkfn	Deferred Tax Assets Nonaccrual Loan Interest DeferredTaxAssetsNonaccrualLoanInterest	970000
CY2018Q4	lkfn	Deferred Tax Assets Long Term Incentive Plan DeferredTaxAssetsLongTermIncentivePlan	2357000
CY2017Q4	lkfn	Deferred Tax Assets Long Term Incentive Plan DeferredTaxAssetsLongTermIncentivePlan	2043000
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	506000
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	403000
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	17466000
CY2017Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	16487000
CY2018Q4	lkfn	Deferred Tax Liabilities Depreciation DeferredTaxLiabilitiesDepreciation	4583000
CY2017Q4	lkfn	Deferred Tax Liabilities Depreciation DeferredTaxLiabilitiesDepreciation	3614000
CY2018Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	877000
CY2017Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	793000
CY2018Q4	lkfn	Deferred Tax Liabilities State Taxes DeferredTaxLiabilitiesStateTaxes	447000
CY2017Q4	lkfn	Deferred Tax Liabilities State Taxes DeferredTaxLiabilitiesStateTaxes	426000
CY2018Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	1280000
CY2017Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	1261000
CY2018Q4	lkfn	Deferred Tax Liabilities Spill Over Dividend DeferredTaxLiabilitiesSpillOverDividend	1231000
CY2017Q4	lkfn	Deferred Tax Liabilities Spill Over Dividend DeferredTaxLiabilitiesSpillOverDividend	1242000
CY2018Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	786000
CY2017Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	752000
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	475000
CY2017Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	412000
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0
CY2018Q4	lkfn	Deferred Tax Liabilities Allocated To Benefit Plan DeferredTaxLiabilitiesAllocatedToBenefitPlan	462000
CY2017Q4	lkfn	Deferred Tax Liabilities Allocated To Benefit Plan DeferredTaxLiabilitiesAllocatedToBenefitPlan	625000
CY2018	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	94542000
CY2017	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	79570000
CY2018	lkfn	Effect Of Changes In Related Parties EffectOfChangesInRelatedParties	0
CY2017	lkfn	Effect Of Changes In Related Parties EffectOfChangesInRelatedParties	-66000
CY2018	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	116238000
CY2017	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	92567000
CY2008Q2	lkfn	Share Based Compensation Shares Authorized Under Equity Incentive Plans ShareBasedCompensationSharesAuthorizedUnderEquityIncentivePlans	1125000
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	839459
CY2018	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	5600000
CY2017	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	5700000
CY2016	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	4200000
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1500000
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2200000
CY2016	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1700000
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0.00
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	7500
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	16.03
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	0
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	0
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	118000
CY2017	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	24000
CY2016	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	625000
CY2018	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	69000
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	0
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	0
CY2016	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	669000
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	25288533
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	25181208
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	25056095
CY2018	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	225831
CY2017	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	219273
CY2016	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	184205
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	213467
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	262900
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	220427
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	25727831
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	25663381
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	25460727
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsAndTax	-5691000
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax	-175000
CY2018	lkfn	Other Comprehensive Income Loss Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossAdjustmentBeforeReclassificationAdjustmentsAndTax	5516000
CY2018	lkfn	Accumulated Other Comprehensive Income Loss Available For Sale Securities Reclassification Adjustment Included In Net Income Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesReclassificationAdjustmentIncludedInNetIncomeNetOfTax	-39000
CY2018	lkfn	Accumulated Other Comprehensive Income Loss Defined Benefit Pension Reclassification Adjustment Included In Net Income Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionReclassificationAdjustmentIncludedInNetIncomeNetOfTax	-197000
CY2018	lkfn	Accumulated Other Comprehensive Income Loss Reclassification Adjustment Included In Net Income Net Of Tax AccumulatedOtherComprehensiveIncomeLossReclassificationAdjustmentIncludedInNetIncomeNetOfTax	236000
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-5652000
CY2018	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-372000
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsAndTax	1525000
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax	-50000
CY2017	lkfn	Other Comprehensive Income Loss Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossAdjustmentBeforeReclassificationAdjustmentsAndTax	-1575000
CY2017	lkfn	Accumulated Other Comprehensive Income Loss Available For Sale Securities Reclassification Adjustment Included In Net Income Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesReclassificationAdjustmentIncludedInNetIncomeNetOfTax	19000
CY2017	lkfn	Accumulated Other Comprehensive Income Loss Defined Benefit Pension Reclassification Adjustment Included In Net Income Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionReclassificationAdjustmentIncludedInNetIncomeNetOfTax	-161000
CY2017	lkfn	Accumulated Other Comprehensive Income Loss Reclassification Adjustment Included In Net Income Net Of Tax AccumulatedOtherComprehensiveIncomeLossReclassificationAdjustmentIncludedInNetIncomeNetOfTax	142000
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1506000
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-211000
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-11000
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	13000
CY2017	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	104000
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	26000
CY2016	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	85000
CY2009Q1	lkfn	Issue Of Warrant Stock Purchase IssueOfWarrantStockPurchase	396538
CY2009Q1	lkfn	Issue Of Warrants Aggregate Purchase Price Of Stock IssueOfWarrantsAggregatePurchasePriceOfStock	56044000
CY2009Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P10Y
CY2009Q1	lkfn	Warrant Exercise Price Per Share WarrantExercisePricePerShare	21.20
CY2009Q1	us-gaap	Share Price SharePrice	17.45
CY2009Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice	21.20
CY2009Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0302
CY2009Q1	lkfn	Warrant Period WarrantPeriod	P10Y
CY2009Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.045759
CY2009Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.418046
CY2009Q1	lkfn	Warrant Fair Value Per Share WarrantFairValuePerShare	4.4433
CY2009Q4	lkfn	Adjustments In Share Capital Warrants Issue AdjustmentsInShareCapitalWarrantsIssue	198269
CY2018	lkfn	Shares Issuable Upon Exercise Of Warrants SharesIssuableUponExerciseOfWarrants	314846
CY2018	lkfn	Warrant Exercise Price Per Share WarrantExercisePricePerShare	13.3503
CY2017	lkfn	Shares Issuable Upon Exercise Of Warrants SharesIssuableUponExerciseOfWarrants	310968
CY2017	lkfn	Warrant Exercise Price Per Share WarrantExercisePricePerShare	13.5168
CY2018	us-gaap	Depreciation Depreciation	5654000
CY2017	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	3000000
CY2017	us-gaap	Depreciation Depreciation	5119000
CY2016	us-gaap	Depreciation Depreciation	4229000
CY2018	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	6400000
CY2016	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	3390000
CY2016	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1150000
CY2018	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-16000
CY2017	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-12000
CY2016	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-17000
CY2018	us-gaap	Amortization Of Mortgage Servicing Rights Ms Rs AmortizationOfMortgageServicingRightsMSRs	503000
CY2017	us-gaap	Amortization Of Mortgage Servicing Rights Ms Rs AmortizationOfMortgageServicingRightsMSRs	599000
CY2016	us-gaap	Amortization Of Mortgage Servicing Rights Ms Rs AmortizationOfMortgageServicingRightsMSRs	598000
CY2018	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	49816000
CY2017	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	54188000
CY2016	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	69998000
CY2018	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	1713000
CY2017	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	1749000
CY2016	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	2047000
CY2018	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	51715000
CY2017	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	57621000
CY2016	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	68692000
CY2018	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-1000
CY2017	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-79000
CY2016	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-160000
CY2018	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-3177000
CY2017	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-3114000
CY2016	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-2860000
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	5608000
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	5698000
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	4210000
CY2018	lkfn	Earning On Life Insurance EarningOnLifeInsurance	1244000
CY2017	lkfn	Earning On Life Insurance EarningOnLifeInsurance	1768000
CY2016	lkfn	Earning On Life Insurance EarningOnLifeInsurance	1392000
CY2018	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	761000
CY2017	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	964000
CY2016	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	669000
CY2018	us-gaap	Increase Decrease In Operating Assets IncreaseDecreaseInOperatingAssets	3301000
CY2017	us-gaap	Increase Decrease In Operating Assets IncreaseDecreaseInOperatingAssets	-787000
CY2016	us-gaap	Increase Decrease In Operating Assets IncreaseDecreaseInOperatingAssets	1386000
CY2018	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	8481000
CY2017	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	2584000
CY2016	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	3757000
CY2018	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	24564000
CY2017	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	19912000
CY2016	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	10115000
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	104975000
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	77242000
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	62199000
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	15302000
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	40877000
CY2016	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	12095000
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	53817000
CY2017	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	61745000
CY2016	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	69343000
CY2018	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	126551000
CY2017	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	139252000
CY2016	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	116196000
CY2018	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	423000
CY2017	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	580000
CY2018	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	101670000
CY2017	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	347217000
CY2016	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	391145000
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	461000
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	10000
CY2016	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	28000
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	7968000
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	9582000
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	9825000
CY2018	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	0
CY2017	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	2250000
CY2016	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	3854000
CY2018	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	21000
CY2017	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	199000
CY2016	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	136000
CY2018	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	569000
CY2017	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0
CY2016	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	360000
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-166442000
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-396050000
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-442448000
CY2018	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	35410000
CY2017	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	430743000
CY2016	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	394491000
CY2018	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	174903000
CY2017	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	100607000
CY2016	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-19577000
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	95000000
CY2016	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	180000000
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	80030000
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	275002000
CY2016	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	70002000
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	25278000
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	21396000
CY2016	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	18200000
CY2018	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	13000
CY2017	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	13000
CY2016	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	13000
CY2018	lkfn	Proceeds From Repayment Of Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromRepaymentOfIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	-2435000
CY2017	lkfn	Proceeds From Repayment Of Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromRepaymentOfIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	-1736000
CY2016	lkfn	Proceeds From Repayment Of Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromRepaymentOfIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	614000
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	463000
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	495000
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	458000
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	102209000
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	327708000
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	466855000
CY2018	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	40742000
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	8900000
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	86606000
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	167280000
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	80674000
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	19033000
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	29120000
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	21613000
CY2018	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	316000
CY2017	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	88000
CY2016	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	105000
CY2018	lkfn	Securities Purchase Not Settled SecuritiesPurchaseNotSettled	0
CY2017	lkfn	Securities Purchase Not Settled SecuritiesPurchaseNotSettled	0
CY2016	lkfn	Securities Purchase Not Settled SecuritiesPurchaseNotSettled	1459000
CY2018Q4	lkfn	Loans Receivable Nonaccrual Troubled Debt Restructured Loans LoansReceivableNonaccrualTroubledDebtRestructuredLoans	4384000
CY2017Q4	lkfn	Loans Receivable Nonaccrual Troubled Debt Restructured Loans LoansReceivableNonaccrualTroubledDebtRestructuredLoans	7750000
CY2018	srt	Mortgage Loans On Real Estate Interest Rate MortgageLoansOnRealEstateInterestRate	0.0391
CY2018	lkfn	Weighted Average Maturity Of Residential Mortgages WeightedAverageMaturityOfResidentialMortgages	P20Y
CY2018	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Qualitative Information ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueQualitativeInformation	81
CY2018	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Discount Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate	0.094
CY2017	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Qualitative Information ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueQualitativeInformation	123
CY2017	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Discount Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate	0.094
CY2018Q4	lkfn	Premises Gross PremisesGross	44717000
CY2017Q4	lkfn	Premises Gross PremisesGross	41694000
CY2018Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	36111000
CY2017Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	34349000
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	97477000
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	92215000
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	39380000
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	35749000
CY2018Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P14Y
CY2018Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	571000
CY2018Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	582000
CY2018Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	595000
CY2018Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	511000
CY2018Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	2792000
CY2018	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	479000
CY2017	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	412000
CY2016	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	377000
CY2018Q4	us-gaap	Goodwill Gross GoodwillGross	5000000
CY2018Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	247903000
CY2017Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	263570000
CY2018Q4	lkfn	Other Time Deposits OtherTimeDeposits	273533000
CY2017Q4	lkfn	Other Time Deposits OtherTimeDeposits	251218000
CY2018Q4	lkfn	Time Deposits100000 To250000 TimeDeposits100000To250000	268058000
CY2017Q4	lkfn	Time Deposits100000 To250000 TimeDeposits100000To250000	236354000
CY2018Q4	lkfn	Timedeposits250000 Ormore Timedeposits250000Ormore	878163000
CY2017Q4	lkfn	Timedeposits250000 Ormore Timedeposits250000Ormore	925011000
CY2018Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	383254000
CY2018Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	58944000
CY2018Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	27978000
CY2018Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	15950000
CY2018Q4	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	305000
CY2018Q4	us-gaap	Secured Debt SecuredDebt	170000000
CY2018Q4	lkfn	Pledged Financial Instruments Not Separately Reported Residential Mortgage Loans And Mortgage Related Securities Available For Sale For Federal Home Bank Debt PledgedFinancialInstrumentsNotSeparatelyReportedResidentialMortgageLoansAndMortgageRelatedSecuritiesAvailableForSaleForFederalHomeBankDebt	412900000
CY2017Q4	lkfn	Pledged Financial Instruments Not Separately Reported Residential Mortgage Loans And Mortgage Related Securities Available For Sale For Federal Home Bank Debt PledgedFinancialInstrumentsNotSeparatelyReportedResidentialMortgageLoansAndMortgageRelatedSecuritiesAvailableForSaleForFederalHomeBankDebt	370000000
CY2018Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	10400000
CY2017Q4	lkfn	Pledged Financial Instruments Not Separately Reported Commerical Loans For Federal Reserve Bank Debt PledgedFinancialInstrumentsNotSeparatelyReportedCommericalLoansForFederalReserveBankDebt	282100000
CY2018Q4	lkfn	Borrowing Capacity Federal Reserve Bank BorrowingCapacityFederalReserveBank	286500000
CY2018Q4	lkfn	Securities Sold Under Agreements To Repurchase Weighted Average Interest Rate SecuritiesSoldUnderAgreementsToRepurchaseWeightedAverageInterestRate	0.0074
CY2016	lkfn	Securities Sold Under Agreements To Repurchase Average Interest Rate SecuritiesSoldUnderAgreementsToRepurchaseAverageInterestRate	0.0025
CY2017Q4	lkfn	Securities Sold Under Agreements To Repurchase Weighted Average Interest Rate SecuritiesSoldUnderAgreementsToRepurchaseWeightedAverageInterestRate	0.0046
CY2016Q4	lkfn	Securities Sold Under Agreements To Repurchase Weighted Average Interest Rate SecuritiesSoldUnderAgreementsToRepurchaseWeightedAverageInterestRate	0.0029
CY2018	lkfn	Securities Sold Under Agreements To Repurchase Average Daily Balance SecuritiesSoldUnderAgreementsToRepurchaseAverageDailyBalance	86874000
CY2017	lkfn	Securities Sold Under Agreements To Repurchase Average Daily Balance SecuritiesSoldUnderAgreementsToRepurchaseAverageDailyBalance	63379000
CY2016	lkfn	Securities Sold Under Agreements To Repurchase Average Daily Balance SecuritiesSoldUnderAgreementsToRepurchaseAverageDailyBalance	57945000
CY2018	lkfn	Securities Sold Under Agreements To Repurchase Average Interest Rate SecuritiesSoldUnderAgreementsToRepurchaseAverageInterestRate	0.0058
CY2017	lkfn	Securities Sold Under Agreements To Repurchase Average Interest Rate SecuritiesSoldUnderAgreementsToRepurchaseAverageInterestRate	0.0039
CY2017	lkfn	Interest And Fee Income Taxable InterestAndFeeIncomeTaxable	150295000
CY2016	lkfn	Interest And Fee Income Taxable InterestAndFeeIncomeTaxable	124830000
CY2018	us-gaap	Net Income Loss NetIncomeLoss	80411000
CY2017	us-gaap	Net Income Loss NetIncomeLoss	57330000
CY2016	us-gaap	Net Income Loss NetIncomeLoss	52084000
CY2018	lkfn	Treasury Shares Purchased Deferred Directors Plan TreasurySharesPurchasedDeferredDirectorsPlan	0
CY2018	lkfn	Treasury Stock Sold And Distributed Under Deferred Directors Plan Value TreasuryStockSoldAndDistributedUnderDeferredDirectorsPlanValue	0
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	392812000
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	426978000
CY2016	us-gaap	Stockholders Equity Note Stock Split StockholdersEquityNoteStockSplit	3-for-2
CY2016	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.73
	us-gaap	Proceeds From Issuance Of Trust Preferred Securities ProceedsFromIssuanceOfTrustPreferredSecurities	30000000
	lkfn	Proceeds From Issuance Of Subordinated Debentures ProceedsFromIssuanceOfSubordinatedDebentures	30900000
	lkfn	Investment In Common Stock InvestmentInCommonStock	928000
CY2018Q4	lkfn	Integral Multiple Subordinated Debentures May Be Redeemed In IntegralMultipleSubordinatedDebenturesMayBeRedeemedIn	1000
CY2018Q4	lkfn	Percentage Of Principal Amount Subordinated Debentures May Be Redeemed At PercentageOfPrincipalAmountSubordinatedDebenturesMayBeRedeemedAt	1
CY2018Q4	lkfn	Trust Preferred Securities And Subordinated Debentures Floating Rate Of Interest TrustPreferredSecuritiesAndSubordinatedDebenturesFloatingRateOfInterest	0.058530
CY2017Q4	lkfn	Trust Preferred Securities And Subordinated Debentures Floating Rate Of Interest TrustPreferredSecuritiesAndSubordinatedDebenturesFloatingRateOfInterest	0.044745
CY2016Q4	lkfn	Trust Preferred Securities And Subordinated Debentures Floating Rate Of Interest TrustPreferredSecuritiesAndSubordinatedDebenturesFloatingRateOfInterest	0.040479
CY2018Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	192290000
CY2017Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	140402000
CY2018Q4	us-gaap	Assets Assets	4875254000
CY2017Q4	us-gaap	Assets Assets	4682976000
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4875254000
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4682976000
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	48453000
CY2017Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	47121000
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	90000000
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	90000000
CY2018Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2017Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	25301732
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	25128773
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	25194903
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	25025933
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	172959
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	168970
CY2018	lkfn	Interest And Fee Income Taxable InterestAndFeeIncomeTaxable	181451000
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.85
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.00
CY2018	lkfn	Gain On Life Insurance GainOnLifeInsurance	206000
CY2017	lkfn	Gain On Life Insurance GainOnLifeInsurance	0
CY2016	lkfn	Gain On Life Insurance GainOnLifeInsurance	0
CY2018	us-gaap	Interest Paid InterestPaid	43606000
CY2017	us-gaap	Interest Paid InterestPaid	29171000
CY2016	us-gaap	Interest Paid InterestPaid	18567000
CY2018	lkfn	Property Transferred To Held For Sale PropertyTransferredToHeldForSale	221000
CY2017	lkfn	Property Transferred To Held For Sale PropertyTransferredToHeldForSale	0
CY2016	lkfn	Property Transferred To Held For Sale PropertyTransferredToHeldForSale	0
CY2018	lkfn	Service Charges On Commercial Deposit Acounts ServiceChargesOnCommercialDepositAcounts	10234000
CY2016	us-gaap	Noninterest Income NoninterestIncome	32864000
CY2018Q4	us-gaap	Interest Expense InterestExpense	14138000
CY2017	lkfn	Service Charges On Commercial Deposit Acounts ServiceChargesOnCommercialDepositAcounts	8230000
CY2016	lkfn	Service Charges On Commercial Deposit Acounts ServiceChargesOnCommercialDepositAcounts	6224000
CY2018	lkfn	Service Charges On Retail Deposit Acounts ServiceChargesOnRetailDepositAcounts	879000
CY2017	lkfn	Service Charges On Retail Deposit Acounts ServiceChargesOnRetailDepositAcounts	905000
CY2016	lkfn	Service Charges On Retail Deposit Acounts ServiceChargesOnRetailDepositAcounts	989000
CY2018	lkfn	Over Drafts Net OverDraftsNet	3581000
CY2017	lkfn	Over Drafts Net OverDraftsNet	3452000
CY2016	lkfn	Over Drafts Net OverDraftsNet	3700000
CY2018	lkfn	Other Service Charges OtherServiceCharges	1137000
CY2017	lkfn	Other Service Charges OtherServiceCharges	1109000
CY2016	lkfn	Other Service Charges OtherServiceCharges	1100000
CY2018	lkfn	Fees And Commissions Debit Cards Interchange Fees FeesAndCommissionsDebitCardsInterchangeFees	5883000
CY2017	lkfn	Fees And Commissions Debit Cards Interchange Fees FeesAndCommissionsDebitCardsInterchangeFees	4663000
CY2016	lkfn	Fees And Commissions Debit Cards Interchange Fees FeesAndCommissionsDebitCardsInterchangeFees	4332000
CY2018	lkfn	Loan Fees LoanFees	2423000
CY2017	lkfn	Loan Fees LoanFees	2231000
CY2016	lkfn	Loan Fees LoanFees	2421000
CY2018	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	985000
CY2017	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	1006000
CY2016	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	928000
CY2018	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	1150000
CY2017	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	982000
CY2016	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	1586000
CY2018	us-gaap	Noninterest Income NoninterestIncome	40110000
CY2017	us-gaap	Noninterest Income NoninterestIncome	36009000
CY2018Q3	us-gaap	Interest Expense InterestExpense	12454000
CY2018Q2	us-gaap	Interest Expense InterestExpense	11262000
CY2018Q1	us-gaap	Interest Expense InterestExpense	9845000
CY2018Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	39590000
CY2018Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	37925000
CY2018Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	37533000
CY2018Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	36223000
CY2018Q4	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	300000
CY2018Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	1100000
CY2018Q2	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	1700000
CY2018Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	3300000
CY2018Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	39290000
CY2018Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	36825000
CY2018Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	35833000
CY2018Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	32923000
CY2018Q4	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	10105000
CY2018Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	10433000
CY2018Q2	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	9693000
CY2018Q1	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	9879000
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4679000
CY2018Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5110000
CY2018Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3264000
CY2017Q4	us-gaap	Interest Expense InterestExpense	8769000
CY2017Q3	us-gaap	Interest Expense InterestExpense	7969000
CY2017Q2	us-gaap	Interest Expense InterestExpense	7002000
CY2018Q4	us-gaap	Noninterest Expense NoninterestExpense	22552000
CY2018Q3	us-gaap	Noninterest Expense NoninterestExpense	22009000
CY2018Q2	us-gaap	Noninterest Expense NoninterestExpense	20274000
CY2018Q1	us-gaap	Noninterest Expense NoninterestExpense	21202000
CY2018Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5480000
CY2017Q1	us-gaap	Interest Expense InterestExpense	6066000
CY2017Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	35392000
CY2017Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	34620000
CY2017Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	33819000
CY2017Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	32061000
CY2017Q4	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	1850000
CY2017Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	450000
CY2017Q2	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	500000
CY2017Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	200000
CY2017Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	33542000
CY2017Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	34170000
CY2017Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	33319000
CY2017Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	31861000
CY2017Q4	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	9462000
CY2017Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	9497000
CY2017Q2	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	8791000
CY2017Q1	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	8259000
CY2017Q4	us-gaap	Noninterest Expense NoninterestExpense	19598000
CY2017Q3	us-gaap	Noninterest Expense NoninterestExpense	20269000
CY2017Q2	us-gaap	Noninterest Expense NoninterestExpense	19352000
CY2017Q1	us-gaap	Noninterest Expense NoninterestExpense	20048000
CY2017Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11779000
CY2017Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7573000
CY2017Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7394000
CY2017Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5558000
CY2018Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	53728000
CY2018Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	50379000
CY2018Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	48795000
CY2018Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	46068000
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	21363000
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	20570000
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	20142000
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	18336000
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.84
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.81
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.80
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.73
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.83
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.80
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.78
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.71
CY2017Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	44161000
CY2017Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	42589000
CY2017Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	40821000
CY2017Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	38127000
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	11627000
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	15825000
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	15364000
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	14514000
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.46
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.63
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.61
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.58
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.45
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.62
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.60
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.57
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	16871000
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	27064000
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	23749000
CY2018	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family: "times new roman", serif; font-size: 10pt; margin-bottom: 0px; margin-top: 0px; margin-right: 0px;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;"><div style="font-weight:bold;display:inline;">Use of Estimates:</div></div></div><div style="font-family: "times new roman", serif; font-size: 12pt; margin-bottom: 0px; margin-top: 0px; margin-right: 0px; background: none;"> </div><div style="font-family: "times new roman", serif; font-size: 10pt; margin-bottom: 0px; margin-top: 0px; text-indent: 0.5in; margin-right: 0px;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">To prepare financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”), management makes estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided and future results could differ.</div></div><table border="0" style="width:100%; table-layout:fixed;" cellspacing="0" cellpadding="0"><tr><td></td></tr></table>
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	20778000
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	31372000
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	27026000
CY2018Q4	lkfn	Deferred Tax Assets Bad Debts DeferredTaxAssetsBadDebts	12478000
CY2017Q4	lkfn	Deferred Tax Assets Bad Debts DeferredTaxAssetsBadDebts	12043000
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	9679000
CY2017Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	8500000
CY2018Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	7787000
CY2017Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	7987000
CY2018	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="font-family: "times new roman", serif; font-size: 10pt; margin-bottom: 0px; margin-top: 0px; margin-right: 0px;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;"><div style="font-weight:bold;display:inline;">Reclassifications:</div></div></div><div style="font-family: "times new roman", serif; font-size: 12pt; margin-bottom: 0px; margin-top: 0px; margin-right: 0px; background: none;"> </div><div style="font-family: "times new roman", serif; font-size: 10pt; margin-bottom: 0px; margin-top: 0px; text-indent: 0.5in; margin-right: 0px;"><div style="font-family: "times new roman", serif; font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">Certain amounts appearing in the financial statements and notes thereto for prior periods have been reclassified to conform with the current presentation. The reclassifications had no effect on net income or stockholders’ equity as previously reported.</div></div><table border="0" style="width:100%; table-layout:fixed;" cellspacing="0" cellpadding="0"><tr><td></td></tr></table>
CY2018Q4	lkfn	Borrowing Capacity Federal Home Loan Bank BorrowingCapacityFederalHomeLoanBank	800000000
CY2018Q4	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	85600000
CY2018Q4	lkfn	Pledged Financial Instruments Not Separately Reported Commerical Loans For Federal Reserve Bank Debt PledgedFinancialInstrumentsNotSeparatelyReportedCommericalLoansForFederalReserveBankDebt	381500000
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-39000
CY2018	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	197000
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	19000
CY2017	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	161000
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	40000
CY2016	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	130000
CY2018Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	325000000
CY2017Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	105242000
CY2016Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	118305000
CY2018Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	83546000
CY2018Q4	lkfn	Deferred Tax Assets Unrealized Gain Losses On Available For Sale Securities Gross DeferredTaxAssetsUnrealizedGainLossesOnAvailableForSaleSecuritiesGross	1300000
CY2017Q4	lkfn	Deferred Tax Assets Unrealized Gain Losses On Available For Sale Securities Gross DeferredTaxAssetsUnrealizedGainLossesOnAvailableForSaleSecuritiesGross	226000
CY2018Q4	us-gaap	Due To Related Parties Current And Noncurrent DueToRelatedPartiesCurrentAndNoncurrent	12100000
CY2018Q4	lkfn	Additional Amount Due To Related Parties Current And Non Current AdditionalAmountDueToRelatedPartiesCurrentAndNonCurrent	1900000
CY2017Q4	us-gaap	Due To Related Parties Current And Noncurrent DueToRelatedPartiesCurrentAndNoncurrent	9600000
CY2017Q4	lkfn	Additional Amount Due To Related Parties Current And Non Current AdditionalAmountDueToRelatedPartiesCurrentAndNonCurrent	862000
CY2017	us-gaap	Loans And Leases Receivable Commitments Fixed Rates LoansAndLeasesReceivableCommitmentsFixedRates	61585000
CY2018	us-gaap	Loans And Leases Receivable Commitments Variable Rates LoansAndLeasesReceivableCommitmentsVariableRates	1674094000
CY2017	us-gaap	Loans And Leases Receivable Commitments Variable Rates LoansAndLeasesReceivableCommitmentsVariableRates	1462624000
CY2016Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	43718000
CY2015Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	43610000
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	10029000
CY2017Q4	us-gaap	Derivative Assets DerivativeAssets	2441000
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	73214000
CY2017Q4	lkfn	Derivativeliabilitygrossvalueoffset Derivativeliabilitygrossvalueoffset	0
CY2017Q4	lkfn	Derivativeliabilitynetvalueoffset Derivativeliabilitynetvalueoffset	-73214000
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	70652000
CY2017Q4	lkfn	Derivativeliabilitycollateralrighttoreclaimcashoffsets Derivativeliabilitycollateralrighttoreclaimcashoffsets	750000
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	3869000
CY2018Q4	lkfn	Derivative Asset Gross Value Offset DerivativeAssetGrossValueOffset	0
CY2018Q4	lkfn	Derivative Asset Net Value Offset DerivativeAssetNetValueOffset	3869000
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	0
CY2018Q4	lkfn	Derivativeassetcollateralobligationtoreturncashnotoffset Derivativeassetcollateralobligationtoreturncashnotoffset	760000
CY2018Q4	us-gaap	Derivative Assets DerivativeAssets	3109000
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	79580000
CY2018Q4	lkfn	Derivativeliabilitygrossvalueoffset Derivativeliabilitygrossvalueoffset	0
CY2018Q4	lkfn	Derivativeliabilitynetvalueoffset Derivativeliabilitynetvalueoffset	-79580000
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	75555000
CY2018Q4	lkfn	Derivativeliabilitycollateralrighttoreclaimcashoffsets Derivativeliabilitycollateralrighttoreclaimcashoffsets	560000
CY2018Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	3465000
CY2018	us-gaap	Loans And Leases Receivable Commitments Fixed Rates LoansAndLeasesReceivableCommitmentsFixedRates	67051000
CY2018Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	26717000
CY2018Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	3914745000
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	2441000
CY2017Q4	lkfn	Derivative Asset Gross Value Offset DerivativeAssetGrossValueOffset	0
CY2017Q4	lkfn	Derivative Asset Net Value Offset DerivativeAssetNetValueOffset	2441000
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	0
CY2017Q4	lkfn	Derivativeassetcollateralobligationtoreturncashnotoffset Derivativeassetcollateralobligationtoreturncashnotoffset	0
CY2017Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	1812000
CY2017Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	3216000
CY2017Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	43905000
CY2017Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	13870000
CY2017Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	3804589000
CY2017Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	3818459000
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-722000
CY2018Q1	lkfn	Percentage Of Interest Income In Net Revenue PercentageOfInterestIncomeInNetRevenue	0.8
CY2018Q1	lkfn	Percentage Of Noninterest Income In Net Revenue PercentageOfNoninterestIncomeInNetRevenue	0.2
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.18
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.28
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.08
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.13
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.23
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.05
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	784000
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-1454000
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-670000
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-4796000
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-1395000
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-1665000
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-2387000
CY2018Q4	lkfn	Operating Lease Obligations OperatingLeaseObligations	5500000
CY2018	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-236000
CY2017	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-142000
CY2016	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-90000
CY2018Q4	us-gaap	Land Land	16649000
CY2017Q4	us-gaap	Land Land	16172000
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	58097000
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	56466000
CY2018Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	946838000
CY2017Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	885622000
CY2018Q4	us-gaap	Deposits Deposits	4044065000
CY2017Q4	us-gaap	Deposits Deposits	4008655000
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	0
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P0Y
CY2018Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	0
CY2018Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	933323000
CY2018Q4	us-gaap	Time Deposits TimeDeposits	1419754000
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	16.03
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	0
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	2541000
CY2018Q4	us-gaap	Other Short Term Borrowings OtherShortTermBorrowings	170000000
CY2017Q4	us-gaap	Other Short Term Borrowings OtherShortTermBorrowings	80030000
CY2018Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	553000
CY2018Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	5604000
CY2018Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	75555000
CY2017Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	70652000
CY2016Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	50045000
CY2018Q4	lkfn	Securities Sold Under Agreements To Repurchase Maximum Month End Balance SecuritiesSoldUnderAgreementsToRepurchaseMaximumMonthEndBalance	106239000
CY2017Q4	lkfn	Securities Sold Under Agreements To Repurchase Maximum Month End Balance SecuritiesSoldUnderAgreementsToRepurchaseMaximumMonthEndBalance	77886000
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	0
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P0Y
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	15302000
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	40877000
CY2018	lkfn	Number Of Debt Securities Available For Sale Sold At Fair Value NumberOfDebtSecuritiesAvailableForSaleSoldAtFairValue	29
CY2017	lkfn	Number Of Debt Securities Available For Sale Sold At Fair Value NumberOfDebtSecuritiesAvailableForSaleSoldAtFairValue	50
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	0
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	0
CY2016Q4	lkfn	Securities Sold Under Agreements To Repurchase Maximum Month End Balance SecuritiesSoldUnderAgreementsToRepurchaseMaximumMonthEndBalance	60198000
CY2018Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	32194000
CY2018Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	26717000
CY2017Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	15897000
CY2017Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	13870000
CY2018	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	18035000
CY2018	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	442000
CY2018	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	306000
CY2017	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	18570000
CY2017	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	584000
CY2017	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	549000
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	7500
CY2018Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	591621000
CY2018Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	2795000
CY2018Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	8867000
CY2017Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	537416000
CY2017Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	5169000
CY2017Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	4092000
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	243000
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	44000
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	755000
CY2016	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	19067000
CY2016	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	582000
CY2016	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	566000
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	2540000
CY2016	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	12095000
CY2018	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	21000
CY2017	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	267000
CY2016	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	83000
CY2018	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	71000
CY2017	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	235000
CY2016	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	17000
CY2016	lkfn	Number Of Debt Securities Available For Sale Sold At Fair Value NumberOfDebtSecuritiesAvailableForSaleSoldAtFairValue	15
CY2018Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	3897455000
CY2018Q4	lkfn	Loans Receivable Recorded Investment30 To89 Days Past Due LoansReceivableRecordedInvestment30To89DaysPastDue	10025000
CY2018Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	0
CY2018Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	7265000
CY2018Q4	lkfn	Financing Receivable Recorded Investment Past Due And Nonaccrual Status FinancingReceivableRecordedInvestmentPastDueAndNonaccrualStatus	17290000
CY2018Q4	us-gaap	Statutory Accounting Practices Statutory Amount Available For Dividend Payments StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPayments	96100000
CY2018	us-gaap	Description Of Regulatory Requirements Capital Adequacy Purposes DescriptionOfRegulatoryRequirementsCapitalAdequacyPurposes	Under the Basel III rules, the Company must hold a capital conservation buffer above the adequately capitalized risk-based capital ratios. The capital conservation buffer is being phased in from 0.000% for 2015 to 2.50% by 2019. The capital conservation buffer for 2018 and 2017 is 1.875% and 1.25%, respectively. The net unrealized gain or loss on available for sale securities is not included in computing regulatory capital.
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	37848000
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	136000
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	346642000
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	8731000
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	384490000
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	8867000
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	177277000
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	1537000
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	111345000
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	2555000
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	288622000
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	4092000
CY2017Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	3799432000
CY2017Q4	lkfn	Loans Receivable Recorded Investment30 To89 Days Past Due LoansReceivableRecordedInvestment30To89DaysPastDue	9619000
CY2017Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	6000
CY2017Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	9402000
CY2017Q4	lkfn	Financing Receivable Recorded Investment Past Due And Nonaccrual Status FinancingReceivableRecordedInvestmentPastDueAndNonaccrualStatus	19027000
CY2018Q4	lkfn	Loans Receivable Accruing Troubled Debt Restructured Loans LoansReceivableAccruingTroubledDebtRestructuredLoans	8016000
CY2017Q4	lkfn	Loans Receivable Accruing Troubled Debt Restructured Loans LoansReceivableAccruingTroubledDebtRestructuredLoans	2893000
CY2018Q4	lkfn	Financing Receivable Modifications FinancingReceivableModifications	12400000
CY2017Q4	lkfn	Financing Receivable Modifications FinancingReceivableModifications	10643000
CY2018	lkfn	Financing Receivable Modification Pre Modification Recorded Investment FinancingReceivableModificationPreModificationRecordedInvestment	7183000
CY2018	lkfn	Financing Receivable Modification Post Modification Recorded Investment FinancingReceivableModificationPostModificationRecordedInvestment	7182000
CY2018	lkfn	Number Of Loans NumberOfLoans	12
CY2017	lkfn	Financing Receivable Modification Pre Modification Recorded Investment FinancingReceivableModificationPreModificationRecordedInvestment	3852000
CY2017	lkfn	Financing Receivable Modification Post Modification Recorded Investment FinancingReceivableModificationPostModificationRecordedInvestment	3854000
CY2016	lkfn	Financing Receivable Modification Pre Modification Recorded Investment FinancingReceivableModificationPreModificationRecordedInvestment	2559000
CY2016	lkfn	Financing Receivable Modification Post Modification Recorded Investment FinancingReceivableModificationPostModificationRecordedInvestment	2619000
CY2016	lkfn	Extension Period For Modified Repayment Terms ExtensionPeriodForModifiedRepaymentTerms	P9M
CY2018Q4	lkfn	Loans Modified In Troubled Debt Restructured Loans LoansModifiedInTroubledDebtRestructuredLoans	3700000
CY2017Q4	lkfn	Loans Modified In Troubled Debt Restructured Loans LoansModifiedInTroubledDebtRestructuredLoans	2300000
CY2018	lkfn	Loan Amount Of Credit Quality Analysis LoanAmountOfCreditQualityAnalysis	250000
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-7339000
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	2245000
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-7238000
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-50000
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	32000
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	66000
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-7289000
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	2213000
CY2016	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-7304000
CY2018	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-1637000
CY2017	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	707000
CY2016	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-2746000
CY2018	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-5652000
CY2017	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	1506000
CY2016	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-4558000
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	269000
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	97000
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-151000
CY2018	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent	-535000
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent	-362000
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent	-64000
CY2018	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	-163000
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	-151000
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	-35000
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-29000
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-5280000
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1717000
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-4529000
CY2018Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	4400000
CY2017Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	3771338000
CY2018	lkfn	Fees And Commissions Depositors Accounts FeesAndCommissionsDepositorsAccounts	15831000
CY2017	lkfn	Fees And Commissions Depositors Accounts FeesAndCommissionsDepositorsAccounts	13696000
CY2016	lkfn	Fees And Commissions Depositors Accounts FeesAndCommissionsDepositorsAccounts	12013000
CY2018	lkfn	Fees And Commissions Loan And Service Fees FeesAndCommissionsLoanAndServiceFees	9291000
CY2017	lkfn	Fees And Commissions Loan And Service Fees FeesAndCommissionsLoanAndServiceFees	7900000
CY2016	lkfn	Fees And Commissions Loan And Service Fees FeesAndCommissionsLoanAndServiceFees	7681000
CY2018	lkfn	Fees And Commissions Credit Card FeesAndCommissionsCreditCard	2461000
CY2017	lkfn	Fees And Commissions Credit Card FeesAndCommissionsCreditCard	2279000
CY2016	lkfn	Fees And Commissions Credit Card FeesAndCommissionsCreditCard	2098000
CY2018	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2018	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2018	us-gaap	Schedule Of Repurchase Agreements ScheduleOfRepurchaseAgreements	There were no other categories of short-term borrowings for which the average balance outstanding during the period was 30 percent or more of stockholders' equity at the end of each period.<table border="0" style="width:100%; table-layout:fixed;" cellspacing="0" cellpadding="0"><tr><td></td></tr></table><div style="font-family: "times new roman", serif; font-size: 12pt; margin-bottom: 0px; margin-top: 0px; margin-right: 0px; background: none;"> </div><div style="font-family: "times new roman", serif; font-size: 12pt; margin-bottom: 0px; margin-top: 0px; margin-right: 0px; background: none;"> </div><div><table style="width: 100%; border-collapse: collapse; border-spacing: 0px;"><tr><td style="border-top: none; border-right: none; border-left: none; border-image: initial; border-bottom: 1.5pt solid black; width: 54.62%; padding: 0in; font-size: 10pt; line-height: 10pt;;vertical-align:bottom;"><div style="margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">(dollars in thousands)</div></div></td><td style="border-top: none; border-right: none; border-left: none; border-image: initial; border-bottom: 1.5pt solid black; width: 14.78%; padding: 0in; font-size: 10pt; line-height: 10pt;"><div style="text-align: center; margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-weight:bold;display:inline;"><div style="font-size: 10pt; font-family: "&quot", serif; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">2018</div></div></div></td><td style="width: 2.26%; padding: 0in; font-family: "&quot", serif;;vertical-align:bottom;"> </td><td style="border-top: none; border-right: none; border-left: none; border-image: initial; border-bottom: 1.5pt solid black; width: 11.9%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;"><div style="text-align: center; margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; font-family: "&quot", serif; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">2017</div></div></td><td style="width: 2.26%; padding: 0in; font-family: "&quot", serif;;vertical-align:bottom;"> </td><td style="border-top: none; border-right: none; border-left: none; border-image: initial; border-bottom: 1.5pt solid black; width: 11.9%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;"><div style="text-align: center; margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; font-family: "&quot", serif; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">2016</div></div></td><td style="width: 2.26%; padding: 0in; font-family: "&quot", serif;;vertical-align:bottom;"> </td></tr><tr><td style="width: 54.62%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">Securities sold under agreements to repurchase</div></div></td><td style="width: 14.78%; padding: 0in; font-family: "&quot", serif;;vertical-align:bottom;"> </td><td style="width: 2.26%; padding: 0in; font-family: "&quot", serif;;vertical-align:bottom;"> </td><td style="width: 11.9%; padding: 0in; font-family: "&quot", serif;;vertical-align:bottom;"> </td><td style="width: 2.26%; padding: 0in; font-family: "&quot", serif;;vertical-align:bottom;"> </td><td style="width: 11.9%; padding: 0in; font-family: "&quot", serif;;vertical-align:bottom;"> </td><td style="width: 2.26%; padding: 0in; font-family: "&quot", serif;;vertical-align:bottom;"> </td></tr><tr><td style="background: rgb(204, 238, 255); width: 54.62%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">  Outstanding at year end</div></div></td><td style="background: rgb(204, 238, 255); width: 14.78%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="text-align: right; margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-weight:bold;display:inline;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">$75,555</div></div></div></td><td style="background: rgb(204, 238, 255); width: 2.26%; padding: 0in; font-family: "&quot", serif;;vertical-align:bottom;"> </td><td style="background: rgb(204, 238, 255); width: 11.9%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="text-align: right; margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">$70,652</div></div></td><td style="background: rgb(204, 238, 255); width: 2.26%; padding: 0in; font-family: "&quot", serif;;vertical-align:bottom;"> </td><td style="background: rgb(204, 238, 255); width: 11.9%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="text-align: right; margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">$50,045</div></div></td><td style="background: rgb(204, 238, 255); width: 2.26%; padding: 0in; font-family: "&quot", serif;;vertical-align:bottom;"> </td></tr><tr><td style="background: white; width: 54.62%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">  Approximate average interest rate at year end</div></div></td><td style="background: white; width: 14.78%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="text-align: right; margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-weight:bold;display:inline;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">0.74</div></div></div></td><td style="background: white; width: 2.26%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">%</div></div></td><td style="background: white; width: 11.9%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="text-align: right; margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">0.46</div></div></td><td style="background: white; width: 2.26%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">%</div></div></td><td style="background: white; width: 11.9%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="text-align: right; margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">0.29</div></div></td><td style="background: white; width: 2.26%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">%</div></div></td></tr><tr><td style="background: rgb(204, 238, 255); width: 54.62%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">  Highest amount outstanding as of any month end</div></div></td><td style="background: rgb(204, 238, 255); width: 14.78%; padding: 0in; font-family: "&quot", serif;;vertical-align:bottom;"> </td><td style="background: rgb(204, 238, 255); width: 2.26%; padding: 0in; font-family: "&quot", serif;;vertical-align:bottom;"> </td><td style="background: rgb(204, 238, 255); width: 11.9%; padding: 0in; font-family: "&quot", serif;;vertical-align:bottom;"> </td><td style="background: rgb(204, 238, 255); width: 2.26%; padding: 0in; font-family: "&quot", serif;;vertical-align:bottom;"> </td><td style="background: rgb(204, 238, 255); width: 11.9%; padding: 0in; font-family: "&quot", serif;;vertical-align:bottom;"> </td><td style="background: rgb(204, 238, 255); width: 2.26%; padding: 0in; font-family: "&quot", serif;;vertical-align:bottom;"> </td></tr><tr><td style="background: white; width: 54.62%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">    during the year</div></div></td><td style="background: white; width: 14.78%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="text-align: right; margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-weight:bold;display:inline;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">$106,239</div></div></div></td><td style="background: white; width: 2.26%; padding: 0in; font-family: "&quot", serif;;vertical-align:bottom;"> </td><td style="background: white; width: 11.9%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="text-align: right; margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">$77,886</div></div></td><td style="background: white; width: 2.26%; padding: 0in; font-family: "&quot", serif;;vertical-align:bottom;"> </td><td style="background: white; width: 11.9%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="text-align: right; margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">$60,198</div></div></td><td style="background: white; width: 2.26%; padding: 0in; font-family: "&quot", serif;;vertical-align:bottom;"> </td></tr><tr><td style="background: rgb(204, 238, 255); width: 54.62%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">  Approximate average outstanding during the year</div></div></td><td style="background: rgb(204, 238, 255); width: 14.78%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="text-align: right; margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-weight:bold;display:inline;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">86,874</div></div></div></td><td style="background: rgb(204, 238, 255); width: 2.26%; padding: 0in; font-family: "&quot", serif;;vertical-align:bottom;"> </td><td style="background: rgb(204, 238, 255); width: 11.9%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="text-align: right; margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">63,379</div></div></td><td style="background: rgb(204, 238, 255); width: 2.26%; padding: 0in; font-family: "&quot", serif;;vertical-align:bottom;"> </td><td style="background: rgb(204, 238, 255); width: 11.9%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="text-align: right; margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">57,945</div></div></td><td style="background: rgb(204, 238, 255); width: 2.26%; padding: 0in; font-family: "&quot", serif;;vertical-align:bottom;"> </td></tr><tr><td style="background: white; width: 54.62%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">  Approximate average interest rate during the year</div></div></td><td style="background: white; width: 14.78%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="text-align: right; margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-weight:bold;display:inline;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">0.58</div></div></div></td><td style="background: white; width: 2.26%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">%</div></div></td><td style="background: white; width: 11.9%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="text-align: right; margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">0.39</div></div></td><td style="background: white; width: 2.26%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">%</div></div></td><td style="background: white; width: 11.9%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="text-align: right; margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">0.25</div></div></td><td style="background: white; width: 2.26%; padding: 0in; font-size: 10pt; line-height: 10pt; font-family: "&quot", serif;;vertical-align:bottom;"><div style="margin-bottom: 0px; font-family: "times new roman", serif; font-size: 10pt; margin-right: 0px; margin-top: 0px; line-height: normal;"><div style="font-size: 10pt; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">%</div></div></td></tr></table><div style="clear: both; max-height: 0px;"></div><div style="clear: both; max-height: 0px;"></div><div style="clear: both; max-height: 0px; background: none;"></div><div style="clear: both; max-height: 0px;"></div><div style="clear: both; max-height: 0px;"></div><div style="clear: both; max-height: 0px;"></div></div>
CY2018	lkfn	Trust Preferred Securities And Subordinated Debentures Description Of Variable Rate Basis TrustPreferredSecuritiesAndSubordinatedDebenturesDescriptionOfVariableRateBasis	(“LIBOR”) plus 3.05%
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2018	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	266000
CY2017	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	265000
CY2016	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	215000
CY2018	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	-50000
CY2017	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	32000
CY2016	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	66000
CY2018	dei	Document Type DocumentType	10-K
CY2018	dei	Amendment Flag AmendmentFlag	false
CY2018	dei	Document Period End Date DocumentPeriodEndDate	2018-12-31
CY2018	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2018	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2018	dei	Entity Registrant Name EntityRegistrantName	LAKELAND FINANCIAL CORP
CY2018	dei	Entity Central Index Key EntityCentralIndexKey	0000721994
CY2018	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2018	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2018	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2018Q2	dei	Entity Public Float EntityPublicFloat	1158232579
CY2018	dei	Trading Symbol TradingSymbol	LKFN
CY2019Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	25614046
CY2018	dei	Entity Shell Company EntityShellCompany	false
CY2018	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2018	dei	Entity Small Business EntitySmallBusiness	false
CY2018	us-gaap	Proceeds From Sale Of Treasury Stock ProceedsFromSaleOfTreasuryStock	115000
CY2017	us-gaap	Proceeds From Sale Of Treasury Stock ProceedsFromSaleOfTreasuryStock	0
CY2016	us-gaap	Proceeds From Sale Of Treasury Stock ProceedsFromSaleOfTreasuryStock	0

Files In Submission

Name	View Source	Status
0000721994-19-000011-index-headers.html	Edgar Link	pending
0000721994-19-000011-index.html	Edgar Link	pending
0000721994-19-000011.txt	Edgar Link	pending
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FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
image2.jpg	Edgar Link	pending
lkfn-20181231.xml	Edgar Link	completed
lkfn-20181231.xsd	Edgar Link	pending
lkfn-20181231_cal.xml	Edgar Link	unprocessable
lkfn-20181231_def.xml	Edgar Link	unprocessable
lkfn-20181231_lab.xml	Edgar Link	unprocessable
lkfn-20181231_pre.xml	Edgar Link	unprocessable
lkfn10k.htm	Edgar Link	pending
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$LKFN
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2018 Form 10-K Financial Statement

#000072199419000011 Filed on February 28, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$LKFN LAKELAND FINANCIAL CORP Stock $lkfn

2018 Form 10-K Financial Statement

#000072199419000011 Filed on February 28, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$LKFN
LAKELAND FINANCIAL CORP Stock $lkfn