$LKFN
LAKELAND FINANCIAL CORP Stock $lkfn

$lkfn Overview Financials Valuation SEC Filings Company Website

2018 Q4 Form 10-Q Financial Statement

#000072199418000049 Filed on November 05, 2018

Income Statement

Concept	2018 Q4	2018 Q3	2017 Q3
Revenue	$53.73M	$50.38M	$42.59M
YoY Change	21.66%	18.29%	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	$1.500M	$1.400M	$1.300M
YoY Change	7.14%	7.69%	18.18%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$14.14M	$12.45M	$7.969M
YoY Change	61.23%	56.28%	48.68%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$26.84M	$25.25M	$23.40M
YoY Change	14.65%	7.91%	17.11%
Income Tax	$5.480M	$4.679M	$7.573M
% Of Pretax Income	20.42%	18.53%	32.37%
Net Earnings	$21.36M	$20.57M	$15.83M
YoY Change	83.74%	29.98%	17.4%
Net Earnings / Revenue	39.76%	40.83%	37.16%
Basic Earnings Per Share	$0.84	$0.81	$0.63
Diluted Earnings Per Share	$0.83	$0.80	$0.62
COMMON SHARES
Basic Shares Outstanding	25.30M shares	25.30M	25.19M shares
Diluted Shares Outstanding		25.75M	25.66M shares

Balance Sheet

Concept	2018 Q4	2018 Q3	2017 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$216.9M	$182.3M	$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	$57.64M	$56.40M
YoY Change	2.89%	2.21%	8.05%
Goodwill	$4.970M	$4.970M
YoY Change	0.0%
Intangibles
YoY Change
Long-Term Investments	$7.000M
YoY Change	32.08%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$4.875B	$4.758B	$4.454B
YoY Change	4.11%	6.81%	6.12%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$10.40M	$8.700M	$5.400M
YoY Change	65.08%	61.11%	5.88%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$75.60M	$97.40M	$63.90M
YoY Change	6.93%	52.43%	6.15%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$10.40M	$8.700M	$5.400M
YoY Change	65.08%	61.11%	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	$26.10M	$17.40M
YoY Change	27.68%	50.0%	-19.82%
Total Long-Term Liabilities	$53.50M	$57.00M	$48.30M
YoY Change	10.08%	18.01%	-8.17%
TOTAL LIABILITIES
Total Short-Term Liabilities	$10.40M	$8.700M	$5.400M
Total Long-Term Liabilities	$53.50M	$57.00M	$48.30M
Total Liabilities	$4.354B	$4.259B	$3.992B
YoY Change	3.3%	6.7%	5.88%
SHAREHOLDERS EQUITY
Retained Earnings	$419.2M	$404.4M
YoY Change	15.22%
Common Stock	$112.4M	$111.0M
YoY Change	3.23%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$3.756M	$3.711M
YoY Change	10.21%
Treasury Stock Shares	$173.0K	171.9K shares	168.2K shares
Shareholders Equity	$521.6M	$498.5M	$462.4M
YoY Change
Total Liabilities & Shareholders Equity	$4.875B	$4.758B	$4.454B
YoY Change	4.11%	6.81%	6.12%

Cashflow Statement

Concept	2018 Q4	2018 Q3	2017 Q3
OPERATING ACTIVITIES
Net Income	$21.36M	$20.57M	$15.83M
YoY Change	83.74%	29.98%	17.4%
Depreciation, Depletion And Amortization	$1.500M	$1.400M	$1.300M
YoY Change	7.14%	7.69%	18.18%
Cash From Operating Activities	$29.80M	$29.60M	$17.20M
YoY Change	23.65%	72.09%	17.01%
INVESTING ACTIVITIES
Capital Expenditures	-$2.600M	-$1.800M	-$1.300M
YoY Change	73.33%	38.46%	-68.29%
Acquisitions
YoY Change
Other Investing Activities	-$82.50M	$4.000M	-$64.40M
YoY Change	-57.08%	-106.21%	-27.64%
Cash From Investing Activities	-$85.00M	$2.200M	-$65.70M
YoY Change	-56.12%	-103.35%	-29.43%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	89.80M	-29.70M	41.00M
YoY Change	-58.39%	-172.44%	-83.46%
NET CHANGE
Cash From Operating Activities	29.80M	29.60M	17.20M
Cash From Investing Activities	-85.00M	2.200M	-65.70M
Cash From Financing Activities	89.80M	-29.70M	41.00M
Net Change In Cash	34.60M	2.100M	-7.500M
YoY Change	-25.11%	-128.0%	-104.42%
FREE CASH FLOW
Cash From Operating Activities	$29.80M	$29.60M	$17.20M
Capital Expenditures	-$2.600M	-$1.800M	-$1.300M
Free Cash Flow	$32.40M	$31.40M	$18.50M
YoY Change	26.56%	69.73%	-1.6%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	4005000	USD
CY2018Q3	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	1627000	USD
CY2017Q3	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	1471000	USD
	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	4676000	USD
CY2018Q3	lkfn	Service Charges On Commercial Deposit Acounts ServiceChargesOnCommercialDepositAcounts	2673000	USD
	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	808000	USD
	lkfn	Service Charges On Commercial Deposit Acounts ServiceChargesOnCommercialDepositAcounts	7386000	USD
CY2017Q3	lkfn	Service Charges On Commercial Deposit Acounts ServiceChargesOnCommercialDepositAcounts	2244000	USD
	lkfn	Service Charges On Commercial Deposit Acounts ServiceChargesOnCommercialDepositAcounts	5942000	USD
CY2018Q3	lkfn	Service Charges On Retail Deposit Acounts ServiceChargesOnRetailDepositAcounts	217000	USD
	lkfn	Service Charges On Retail Deposit Acounts ServiceChargesOnRetailDepositAcounts	658000	USD
CY2017Q3	lkfn	Service Charges On Retail Deposit Acounts ServiceChargesOnRetailDepositAcounts	222000	USD
	lkfn	Service Charges On Retail Deposit Acounts ServiceChargesOnRetailDepositAcounts	675000	USD
CY2018Q3	lkfn	Overdrafts Net OverdraftsNet	935000	USD
	lkfn	Overdrafts Net OverdraftsNet	2652000	USD
CY2017Q3	lkfn	Overdrafts Net OverdraftsNet	879000	USD
	lkfn	Overdrafts Net OverdraftsNet	2571000	USD
CY2018Q3	lkfn	Other Service Charges OtherServiceCharges	289000	USD
	lkfn	Other Service Charges OtherServiceCharges	846000	USD
CY2017Q3	lkfn	Other Service Charges OtherServiceCharges	286000	USD
	lkfn	Other Service Charges OtherServiceCharges	839000	USD
CY2018Q3	lkfn	Fees And Commissions Debit Cards Interchange Fees FeesAndCommissionsDebitCardsInterchangeFees	1473000	USD
	lkfn	Fees And Commissions Debit Cards Interchange Fees FeesAndCommissionsDebitCardsInterchangeFees	4417000	USD
CY2017Q3	lkfn	Fees And Commissions Debit Cards Interchange Fees FeesAndCommissionsDebitCardsInterchangeFees	1166000	USD
	lkfn	Fees And Commissions Debit Cards Interchange Fees FeesAndCommissionsDebitCardsInterchangeFees	3466000	USD
CY2018Q3	lkfn	Loan Fees LoanFees	574000	USD
	lkfn	Loan Fees LoanFees	1742000	USD
CY2017Q3	lkfn	Loan Fees LoanFees	630000	USD
	lkfn	Loan Fees LoanFees	1649000	USD
CY2017Q3	us-gaap	Noninterest Income NoninterestIncome	9497000	USD
	us-gaap	Noninterest Income NoninterestIncome	26547000	USD
CY2018Q3	us-gaap	Cash And Due From Banks CashAndDueFromBanks	151127000	USD
CY2017Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	140402000	USD
CY2017Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	35778000	USD
CY2018Q3	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	31193000	USD
CY2018Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	182320000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	176180000	USD
CY2018Q3	us-gaap	Available For Sale Securities AvailableForSaleSecurities	570568000	USD
CY2017Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	538493000	USD
CY2018Q3	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group Commercial Real Estate LoansReceivableHeldForSaleNetNotPartOfDisposalGroupCommercialRealEstate	3488000	USD
CY2017Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group Commercial Real Estate LoansReceivableHeldForSaleNetNotPartOfDisposalGroupCommercialRealEstate	3346000	USD
CY2018Q3	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	3794782000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	3771338000	USD
CY2018Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	57644000	USD
CY2018Q3	us-gaap	Other Assets OtherAssets	37275000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	56466000	USD
CY2018Q3	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	76998000	USD
CY2017Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	75879000	USD
CY2018Q3	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	13772000	USD
CY2017Q4	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	13772000	USD
CY2018Q3	us-gaap	Interest Receivable InterestReceivable	15802000	USD
CY2017Q4	us-gaap	Interest Receivable InterestReceivable	14093000	USD
CY2018Q3	us-gaap	Goodwill Goodwill	4970000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	4970000	USD
CY2017Q4	us-gaap	Other Liabilities OtherLiabilities	17733000	USD
CY2017Q4	us-gaap	Other Assets OtherAssets	28439000	USD
CY2018Q3	us-gaap	Assets Assets	4757619000	USD
CY2017Q4	us-gaap	Assets Assets	4682976000	USD
CY2018Q3	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	880363000	USD
CY2017Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	885622000	USD
CY2018Q3	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	3135561000	USD
CY2017Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	3123033000	USD
CY2018Q3	us-gaap	Deposits Deposits	4015924000	USD
CY2017Q4	us-gaap	Deposits Deposits	4008655000	USD
CY2018Q3	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	77352000	USD
CY2017Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	70652000	USD
CY2018Q3	us-gaap	Federal Home Loan Bank Borrowings Fair Value Disclosure FederalHomeLoanBankBorrowingsFairValueDisclosure	80000000	USD
CY2017Q4	us-gaap	Federal Home Loan Bank Borrowings Fair Value Disclosure FederalHomeLoanBankBorrowingsFairValueDisclosure	80030000	USD
CY2018Q3	us-gaap	Subordinated Debt SubordinatedDebt	30928000	USD
CY2017Q4	us-gaap	Subordinated Debt SubordinatedDebt	30928000	USD
CY2018Q3	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	208280000	USD
CY2017Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	181610000	USD
CY2018Q3	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	8742000	USD
CY2017Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	6311000	USD
CY2018Q3	us-gaap	Other Liabilities OtherLiabilities	26132000	USD
CY2018Q3	us-gaap	Liabilities Liabilities	4259078000	USD
CY2017Q4	us-gaap	Liabilities Liabilities	4214309000	USD
CY2018Q3	us-gaap	Common Stock Value CommonStockValue	111045000	USD
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	108862000	USD
CY2018Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	404394000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	363794000	USD
CY2018Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-13276000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-670000	USD
CY2018Q3	us-gaap	Treasury Stock Value TreasuryStockValue	3711000	USD
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	3408000	USD
CY2018Q3	us-gaap	Minority Interest MinorityInterest	89000	USD
CY2017Q4	us-gaap	Minority Interest MinorityInterest	89000	USD
CY2018Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	498541000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	468667000	USD
CY2018Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4757619000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4682976000	USD
CY2018Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	48343000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	47121000	USD
CY2018Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	90000000	shares
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	90000000	shares
CY2018Q3	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2017Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2018Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	25301732	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	25194903	shares
CY2018Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	25129796	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	25025933	shares
CY2018Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	171936	shares
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	168970	shares
	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="font-family: "times new roman", times, serif; font-size: 10pt; margin-bottom: 0px; margin-top: 0px; margin-right: 0px; background: none;"><div style="font-family: "times new roman", times, serif; font-size: 10pt; background: none; 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", times, serif; font-size: 10pt; margin-bottom: 0px; margin-top: 0px; margin-right: 0px; background: none;"> </div><div style="font-family: "times new roman", times, serif; font-size: 10pt; margin-bottom: 0px; margin-top: 0px; text-indent: 0.5in; margin-right: 0px; background: none;"><div style="font-family: "times new roman", times, serif; font-size: 10pt; background: none; 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>
CY2018Q3	lkfn	Interest And Fee Income Taxable InterestAndFeeIncomeTaxable	46127000	USD
CY2017Q3	lkfn	Interest And Fee Income Taxable InterestAndFeeIncomeTaxable	38630000	USD
	lkfn	Interest And Fee Income Taxable InterestAndFeeIncomeTaxable	132360000	USD
	lkfn	Interest And Fee Income Taxable InterestAndFeeIncomeTaxable	110044000	USD
CY2018Q3	lkfn	Interest And Fee Income Nontaxable InterestAndFeeIncomeNontaxable	208000	USD
CY2017Q3	lkfn	Interest And Fee Income Nontaxable InterestAndFeeIncomeNontaxable	205000	USD
	lkfn	Interest And Fee Income Nontaxable InterestAndFeeIncomeNontaxable	627000	USD
	lkfn	Interest And Fee Income Nontaxable InterestAndFeeIncomeNontaxable	517000	USD
CY2018Q3	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	2275000	USD
CY2017Q3	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	2349000	USD
	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	7201000	USD
	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	7033000	USD
CY2018Q3	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	1570000	USD
CY2017Q3	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	1309000	USD
	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	4367000	USD
	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	3745000	USD
CY2018Q3	us-gaap	Interest Income Other InterestIncomeOther	199000	USD
CY2017Q3	us-gaap	Interest Income Other InterestIncomeOther	96000	USD
	us-gaap	Interest Income Other InterestIncomeOther	687000	USD
	us-gaap	Interest Income Other InterestIncomeOther	198000	USD
CY2018Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	50379000	USD
CY2017Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	42589000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	145242000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	121537000	USD
CY2018Q3	us-gaap	Interest Expense Deposits InterestExpenseDeposits	11473000	USD
CY2017Q3	us-gaap	Interest Expense Deposits InterestExpenseDeposits	7037000	USD
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	31488000	USD
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	18722000	USD
CY2018Q3	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	555000	USD
CY2017Q3	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	588000	USD
	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	861000	USD
	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	1329000	USD
CY2018Q3	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	426000	USD
CY2017Q3	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	344000	USD
	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	1212000	USD
	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	986000	USD
CY2018Q3	us-gaap	Interest Expense InterestExpense	12454000	USD
CY2017Q3	us-gaap	Interest Expense InterestExpense	7969000	USD
	us-gaap	Interest Expense InterestExpense	33561000	USD
	us-gaap	Interest Expense InterestExpense	21037000	USD
CY2018Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	37925000	USD
CY2017Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	34620000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	111681000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	100500000	USD
CY2018Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	1100000	USD
CY2017Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	450000	USD
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	6100000	USD
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	1150000	USD
CY2018Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	36825000	USD
CY2017Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	34170000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	105581000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	99350000	USD
CY2018Q3	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	376000	USD
CY2017Q3	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	330000	USD
	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	1043000	USD
	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	950000	USD
CY2018Q3	lkfn	Fees And Commissions Depositors Accounts FeesAndCommissionsDepositorsAccounts	4114000	USD
CY2017Q3	lkfn	Fees And Commissions Depositors Accounts FeesAndCommissionsDepositorsAccounts	3631000	USD
	lkfn	Fees And Commissions Depositors Accounts FeesAndCommissionsDepositorsAccounts	11542000	USD
	lkfn	Fees And Commissions Depositors Accounts FeesAndCommissionsDepositorsAccounts	10027000	USD
CY2017Q3	lkfn	Fees And Commissions Loan And Service Fees FeesAndCommissionsLoanAndServiceFees	2060000	USD
	lkfn	Fees And Commissions Loan And Service Fees FeesAndCommissionsLoanAndServiceFees	5850000	USD
CY2018Q3	lkfn	Fees And Commissions Credit Card FeesAndCommissionsCreditCard	643000	USD
CY2017Q3	lkfn	Fees And Commissions Credit Card FeesAndCommissionsCreditCard	588000	USD
	lkfn	Fees And Commissions Credit Card FeesAndCommissionsCreditCard	1834000	USD
	lkfn	Fees And Commissions Credit Card FeesAndCommissionsCreditCard	1696000	USD
CY2018Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	466000	USD
CY2017Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	397000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1177000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1270000	USD
CY2018Q3	us-gaap	Noninterest Income Other NoninterestIncomeOther	561000	USD
CY2017Q3	us-gaap	Noninterest Income Other NoninterestIncomeOther	718000	USD
	us-gaap	Noninterest Income Other NoninterestIncomeOther	1816000	USD
	us-gaap	Noninterest Income Other NoninterestIncomeOther	1886000	USD
CY2018Q3	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	319000	USD
CY2017Q3	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	302000	USD
	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	998000	USD
	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	811000	USD
CY2018Q3	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	0	USD
CY2017Q3	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	0	USD
	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	-6000	USD
	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	52000	USD
CY2018Q3	us-gaap	Noninterest Income NoninterestIncome	10433000	USD
	us-gaap	Noninterest Income NoninterestIncome	30005000	USD
CY2018Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	12755000	USD
CY2017Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	11678000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	36267000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	34062000	USD
CY2018Q3	us-gaap	Occupancy Net OccupancyNet	1229000	USD
CY2017Q3	us-gaap	Occupancy Net OccupancyNet	1131000	USD
	us-gaap	Occupancy Net OccupancyNet	3892000	USD
	us-gaap	Occupancy Net OccupancyNet	3405000	USD
CY2018Q3	us-gaap	Equipment Expense EquipmentExpense	1316000	USD
CY2017Q3	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	2032000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	7292000	USD
CY2017Q3	us-gaap	Equipment Expense EquipmentExpense	1182000	USD
	us-gaap	Equipment Expense EquipmentExpense	3840000	USD
	us-gaap	Equipment Expense EquipmentExpense	3413000	USD
CY2018Q3	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	2489000	USD
CY2018Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1983000	USD
CY2017Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1596000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	5126000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	4811000	USD
CY2018Q3	us-gaap	Noninterest Expense NoninterestExpense	22009000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	6022000	USD
CY2018Q3	lkfn	Corporate And Business Development Expense CorporateAndBusinessDevelopmentExpense	891000	USD
CY2017Q3	lkfn	Corporate And Business Development Expense CorporateAndBusinessDevelopmentExpense	1245000	USD
	lkfn	Corporate And Business Development Expense CorporateAndBusinessDevelopmentExpense	3070000	USD
	lkfn	Corporate And Business Development Expense CorporateAndBusinessDevelopmentExpense	3943000	USD
CY2018Q3	lkfn	Regulatory Fees And Federal Deposit Insurance Corporation Insurance RegulatoryFeesAndFederalDepositInsuranceCorporationInsurance	412000	USD
CY2017Q3	lkfn	Regulatory Fees And Federal Deposit Insurance Corporation Insurance RegulatoryFeesAndFederalDepositInsuranceCorporationInsurance	443000	USD
	lkfn	Regulatory Fees And Federal Deposit Insurance Corporation Insurance RegulatoryFeesAndFederalDepositInsuranceCorporationInsurance	1282000	USD
	lkfn	Regulatory Fees And Federal Deposit Insurance Corporation Insurance RegulatoryFeesAndFederalDepositInsuranceCorporationInsurance	1296000	USD
CY2018Q3	us-gaap	Professional Fees ProfessionalFees	934000	USD
CY2017Q3	us-gaap	Professional Fees ProfessionalFees	962000	USD
	us-gaap	Professional Fees ProfessionalFees	2716000	USD
	us-gaap	Professional Fees ProfessionalFees	2717000	USD
CY2017Q3	us-gaap	Noninterest Expense NoninterestExpense	20269000	USD
	us-gaap	Noninterest Expense NoninterestExpense	63485000	USD
	us-gaap	Noninterest Expense NoninterestExpense	59669000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	25249000	USD
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	23398000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	72101000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	66228000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4679000	USD
CY2017Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7573000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13053000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	20525000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	20570000	USD
	us-gaap	Net Income Loss NetIncomeLoss	59048000	USD
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.81
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.33
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.80
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.30
CY2017Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	56000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	15825000	USD
	us-gaap	Net Income Loss NetIncomeLoss	45703000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-4576000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	56000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-15978000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	4127000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	0	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	0	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-6000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-4576000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-15972000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	4075000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-960000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	13000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-3459000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	1357000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-3616000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	43000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-12513000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	2718000	USD
CY2018Q3	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	67000	USD
CY2017Q3	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	66000	USD
	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	200000	USD
	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	199000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	-17000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	-26000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	-52000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	-78000	USD
CY2018Q3	lkfn	Operating Lease Obligations OperatingLeaseObligations	5600000	USD
CY2018Q1	lkfn	Percentage Of Interest Income In Net Revenue PercentageOfInterestIncomeInNetRevenue	0.8	pure
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	2435000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-50000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-40000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-148000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-121000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-3566000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	83000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-12365000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	2839000	USD
CY2018Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	17004000	USD
CY2017Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	15908000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	46683000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	48542000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	426978000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	468578000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2839000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-12365000	USD
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	15866000	USD
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	18713000	USD
	lkfn	Treasury Stock Sold And Distributed Under Deferred Directors Planvalue TreasuryStockSoldAndDistributedUnderDeferredDirectorsPlanvalue	0	USD
	lkfn	Treasury Shares Purchased Deferred Directors Plan TreasurySharesPurchasedDeferredDirectorsPlan	0	USD
	lkfn	Treasury Shares Purchased Deferred Directors Plan TreasurySharesPurchasedDeferredDirectorsPlan	0	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	1736000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	4509000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	4315000	USD
CY2017Q3	us-gaap	Stockholders Equity StockholdersEquity	462427000	USD
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	498452000	USD
CY2018Q3	lkfn	Fees And Commissions Loan And Service Fees FeesAndCommissionsLoanAndServiceFees	2327000	USD
	lkfn	Fees And Commissions Loan And Service Fees FeesAndCommissionsLoanAndServiceFees	6925000	USD
CY2018Q3	lkfn	Net Non Interest Income Expense NetNonInterestIncomeExpense	399000	USD
	lkfn	Net Non Interest Income Expense NetNonInterestIncomeExpense	1449000	USD
CY2018Q1	lkfn	Percentage Of Noninterest Income In Net Revenue PercentageOfNoninterestIncomeInNetRevenue	0.2	pure
	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2018Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	585323000	USD
CY2017Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	537416000	USD
CY2018Q3	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	1398000	USD
CY2017Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	5169000	USD
CY2018Q3	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	16153000	USD
CY2017Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	4092000	USD
CY2018Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	2548000	USD
CY2018Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	23823000	USD
CY2018Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	35378000	USD
CY2018Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	157254000	USD
CY2018Q3	lkfn	Available For Sale Securities With Maturities Amortized Cost AvailableForSaleSecuritiesWithMaturitiesAmortizedCost	219003000	USD
CY2018Q3	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	366320000	USD
CY2018Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	2558000	USD
CY2018Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	23868000	USD
CY2018Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	34968000	USD
CY2018Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	153068000	USD
CY2018Q3	lkfn	Available For Sale Securities With Maturities Fair Value AvailableForSaleSecuritiesWithMaturitiesFairValue	214462000	USD
CY2018Q3	us-gaap	Mortgage Backed Securities Available For Sale Fair Value Disclosure MortgageBackedSecuritiesAvailableForSaleFairValueDisclosure	356106000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	12322000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	35845000	USD
	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	21000	USD
	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	256000	USD
	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	27000	USD
	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	204000	USD
CY2018Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	294577000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	177277000	USD
CY2018Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	199309000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	111345000	USD
CY2018Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	493886000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	288622000	USD
CY2018Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	6254000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	1537000	USD
CY2018Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	9899000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	2555000	USD
CY2018Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	16153000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	4092000	USD
CY2018Q3	lkfn	Number Of Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosurem Number Of Positions Less Than12 Months NumberOfAvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosuremNumberOfPositionsLessThan12Months	196	pure
CY2017Q4	lkfn	Number Of Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosurem Number Of Positions Less Than12 Months NumberOfAvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosuremNumberOfPositionsLessThan12Months	69	pure
CY2018Q3	lkfn	Number Of Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosurem Number Of Positions12 Months Or More NumberOfAvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosuremNumberOfPositions12MonthsOrMore	123	pure
CY2017Q4	lkfn	Number Of Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosurem Number Of Positions12 Months Or More NumberOfAvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosuremNumberOfPositions12MonthsOrMore	84	pure
CY2018Q3	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	319	pure
CY2017Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	153	pure
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.63
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.74
CY2018Q3	lkfn	Available For Sales Securities Pledged As Collateral AvailableForSalesSecuritiesPledgedAsCollateral	166900000	USD
CY2017Q4	lkfn	Available For Sales Securities Pledged As Collateral AvailableForSalesSecuritiesPledgedAsCollateral	171100000	USD
CY2018Q3	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	3844622000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	3819525000	USD
	lkfn	Percentage Of Loans And Leases Receivable Gross Carrying Amount PercentageOfLoansAndLeasesReceivableGrossCarryingAmount	1.0000	pure
CY2017	lkfn	Percentage Of Loans And Leases Receivable Gross Carrying Amount PercentageOfLoansAndLeasesReceivableGrossCarryingAmount	1.0000	pure
CY2018Q3	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	614000	USD
CY2017Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	47000	USD
CY2018Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	47706000	USD
CY2017Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	44563000	USD
CY2018Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1100000	USD
CY2018Q3	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	581000	USD
CY2017Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	450000	USD
CY2017Q3	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	170000	USD
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	5686000	USD
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	934000	USD
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	1333000	USD
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	1318000	USD
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	39448000	USD
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	43601000	USD
	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-24000	USD
	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-77000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-2463000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-2261000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	4315000	USD
	lkfn	Earning On Life Insurance EarningOnLifeInsurance	1177000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	4509000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	458000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	10000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	5430000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	8096000	USD
	lkfn	Earning On Life Insurance EarningOnLifeInsurance	1270000	USD
	lkfn	Gain On Life Insurance GainOnLifeInsurance	206000	USD
	lkfn	Gain On Life Insurance GainOnLifeInsurance	0	USD
	us-gaap	Increase Decrease In Operating Assets IncreaseDecreaseInOperatingAssets	4607000	USD
	us-gaap	Increase Decrease In Operating Assets IncreaseDecreaseInOperatingAssets	2770000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	6180000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-505000	USD
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	16120000	USD
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	7434000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	75168000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	53137000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	12322000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	35845000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	42021000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	48237000	USD
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	100702000	USD
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	114239000	USD
	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	371000	USD
	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	540000	USD
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	29860000	USD
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	163784000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	29000	USD
	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	21000	USD
	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	124000	USD
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	569000	USD
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-81401000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-202443000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	7269000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	296078000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	80030000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	180002000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	18700000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	15853000	USD
	lkfn	Proceeds From Repayment Of Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromRepaymentOfIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	-2435000	USD
	lkfn	Proceeds From Repayment Of Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromRepaymentOfIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	-1736000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	418000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	12373000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	111859000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	6140000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-37447000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	13033000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	19818000	USD
	lkfn	Securities Purchase Not Settled SecuritiesPurchaseNotSettled	4018000	USD
	lkfn	Securities Purchase Not Settled SecuritiesPurchaseNotSettled	1793000	USD
CY2018Q3	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	118000	USD
CY2018Q3	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	463000	USD
CY2017Q3	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	654000	USD
CY2017Q3	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	-484000	USD
	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	4878000	USD
	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	1563000	USD
	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	-629000	USD
CY2018Q3	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	42309000	USD
CY2018Q3	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	3822215000	USD
CY2017Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	43905000	USD
CY2017Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	3804589000	USD
CY2017Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	236000	USD
CY2018Q3	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	243000	USD
CY2018Q3	lkfn	Loans Receivable Nonaccrual Troubled Debt Restructured Loans LoansReceivableNonaccrualTroubledDebtRestructuredLoans	7313000	USD
CY2017Q4	lkfn	Loans Receivable Nonaccrual Troubled Debt Restructured Loans LoansReceivableNonaccrualTroubledDebtRestructuredLoans	7750000	USD
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	13000	USD
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	13000	USD
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	316000	USD
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	88000	USD
CY2018Q3	lkfn	Loans Modified In Troubled Debt Restructured Loans LoansModifiedInTroubledDebtRestructuredLoans	2100000	USD
CY2017Q4	lkfn	Loans Modified In Troubled Debt Restructured Loans LoansModifiedInTroubledDebtRestructuredLoans	2300000	USD
	lkfn	Loan Amount Of Credit Quality Analysis LoanAmountOfCreditQualityAnalysis	250000	USD
CY2018Q3	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	4300000	USD
	lkfn	Percentage Of Discount From Appraised Value PercentageOfDiscountFromAppraisedValue	0.0388	pure
	lkfn	Weighted Average Maturity Of Residential Mortgages WeightedAverageMaturityOfResidentialMortgages	P20Y
	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Qualitative Information ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueQualitativeInformation	87
CY2017	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Qualitative Information ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueQualitativeInformation	123
	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Discount Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate	0.094	pure
CY2017	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Discount Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate	0.094	pure
CY2017Q4	us-gaap	Defined Benefit Plan Expected Future Employer Contributions Next Fiscal Year DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear	0	USD
CY2018Q3	us-gaap	Defined Benefit Plan Expected Future Employer Contributions Next Fiscal Year DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear	368200	USD
CY2018Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	25301033	shares
CY2017Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	25193894	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	25284085	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	25176593	shares
CY2018Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	444118	shares
CY2017Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	462509	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	435608	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	464149	shares
CY2018Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	25745151	shares
CY2017Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	25656403	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	25719693	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	25640742	shares
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsAndTax	-12519000	USD
	lkfn	Accumulated Other Comprehensive Income Loss Available For Sale Securities Reclassification Adjustment Included In Net Income Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesReclassificationAdjustmentIncludedInNetIncomeNetOfTax	-6000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-12513000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax	0	USD
	lkfn	Accumulated Other Comprehensive Income Loss Defined Benefit Pension Reclassification Adjustment Included In Net Income Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionReclassificationAdjustmentIncludedInNetIncomeNetOfTax	148000	USD
	lkfn	Other Comprehensive Income Loss Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossAdjustmentBeforeReclassificationAdjustmentsAndTax	-12519000	USD
	lkfn	Accumulated Other Comprehensive Income Loss Reclassification Adjustment Included In Net Income Net Of Tax AccumulatedOtherComprehensiveIncomeLossReclassificationAdjustmentIncludedInNetIncomeNetOfTax	154000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsAndTax	2749000	USD
	lkfn	Accumulated Other Comprehensive Income Loss Available For Sale Securities Reclassification Adjustment Included In Net Income Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesReclassificationAdjustmentIncludedInNetIncomeNetOfTax	31000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	2718000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax	0	USD
	lkfn	Accumulated Other Comprehensive Income Loss Defined Benefit Pension Reclassification Adjustment Included In Net Income Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionReclassificationAdjustmentIncludedInNetIncomeNetOfTax	121000	USD
	lkfn	Other Comprehensive Income Loss Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossAdjustmentBeforeReclassificationAdjustmentsAndTax	2749000	USD
	lkfn	Accumulated Other Comprehensive Income Loss Reclassification Adjustment Included In Net Income Net Of Tax AccumulatedOtherComprehensiveIncomeLossReclassificationAdjustmentIncludedInNetIncomeNetOfTax	90000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	784000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-1454000	USD
CY2018Q3	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-11657000	USD
CY2018Q3	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-1619000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-722000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-1665000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-2387000	USD
CY2017Q3	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1996000	USD
CY2017Q3	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-1544000	USD
CY2017Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	452000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	17000	USD
CY2018Q3	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	50000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	26000	USD
CY2017Q3	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	40000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-6000	USD
	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	52000	USD
	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	148000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	21000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	31000	USD
	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	78000	USD
	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	121000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	52000	USD
CY2018Q3	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-50000	USD
CY2017Q3	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-40000	USD
	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-154000	USD
	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-90000	USD
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.63
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.82
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.62
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.78
CY2018Q3	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	4478000	USD
CY2018Q3	lkfn	Derivative Asset Gross Value Offset DerivativeAssetGrossValueOffset	0	USD
CY2018Q3	lkfn	Derivative Asset Net Value Offset DerivativeAssetNetValueOffset	4478000	USD
CY2018Q3	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	0	USD
CY2018Q3	lkfn	Derivativeassetcollateralobligationtoreturncashnotoffset Derivativeassetcollateralobligationtoreturncashnotoffset	2180000	USD
CY2018Q3	us-gaap	Derivative Assets DerivativeAssets	2298000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	2441000	USD
CY2017Q4	lkfn	Derivative Asset Gross Value Offset DerivativeAssetGrossValueOffset	0	USD
CY2017Q4	lkfn	Derivative Asset Net Value Offset DerivativeAssetNetValueOffset	2441000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	0	USD
CY2017Q4	lkfn	Derivativeassetcollateralobligationtoreturncashnotoffset Derivativeassetcollateralobligationtoreturncashnotoffset	0	USD
CY2017Q4	us-gaap	Derivative Assets DerivativeAssets	2441000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	73214000	USD
CY2017Q4	lkfn	Derivativeliabilitygrossvalueoffset Derivativeliabilitygrossvalueoffset	0	USD
CY2017Q4	lkfn	Derivativeliabilitynetvalueoffset Derivativeliabilitynetvalueoffset	73214000	USD
CY2017Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	1812000	USD
CY2018Q3	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	81832000	USD
CY2018Q3	lkfn	Derivativeliabilitygrossvalueoffset Derivativeliabilitygrossvalueoffset	0	USD
CY2018Q3	lkfn	Derivativeliabilitynetvalueoffset Derivativeliabilitynetvalueoffset	81832000	USD
CY2018Q3	us-gaap	Derivative Liabilities DerivativeLiabilities	4480000	USD
CY2018Q3	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	77352000	USD
CY2017Q4	lkfn	Derivativeliabilitycollateralrighttoreclaimcashoffsets Derivativeliabilitycollateralrighttoreclaimcashoffsets	750000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	70652000	USD
	us-gaap	Depreciation Depreciation	4199000	USD
	us-gaap	Depreciation Depreciation	3712000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	6100000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1150000	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-16000	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-21000	USD
	us-gaap	Amortization Of Mortgage Servicing Rights Ms Rs AmortizationOfMortgageServicingRightsMSRs	379000	USD
	us-gaap	Amortization Of Mortgage Servicing Rights Ms Rs AmortizationOfMortgageServicingRightsMSRs	454000	USD
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	38926000	USD
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	41472000	USD
	lkfn	Number Of Debt Securities Available For Sale Sold At Fair Value NumberOfDebtSecuritiesAvailableForSaleSoldAtFairValue	22	shares
	lkfn	Number Of Debt Securities Available For Sale Sold At Fair Value NumberOfDebtSecuritiesAvailableForSaleSoldAtFairValue	35	shares
CY2018Q3	us-gaap	Federal Funds Purchased FederalFundsPurchased	20000000	USD
CY2017Q4	us-gaap	Federal Funds Purchased FederalFundsPurchased	0	USD
CY2018Q3	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	27080000	USD
CY2018Q3	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	20910000	USD
CY2017Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	15897000	USD
CY2017Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	13870000	USD
CY2018Q3	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	20270000	USD
CY2018Q3	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	108000	USD
CY2018Q3	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	85000	USD
	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	1337000	USD
CY2017Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	315000	USD
CY2017Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	14000	USD
CY2017Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	11000	USD
CY2017Q3	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	18541000	USD
CY2017Q3	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	311000	USD
CY2017Q3	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	308000	USD
	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	992000	USD
	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	26000	USD
	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	23000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	16785000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	218000	USD
	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	197000	USD
	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	22000	USD
	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	19000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	19661000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	465000	USD
	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	459000	USD
	lkfn	Financing Receivable Modification Pre Modification Recorded Investment FinancingReceivableModificationPreModificationRecordedInvestment	4253000	USD
	lkfn	Financing Receivable Modification Post Modification Recorded Investment FinancingReceivableModificationPostModificationRecordedInvestment	4252000	USD
CY2017Q3	lkfn	Financing Receivable Modification Pre Modification Recorded Investment FinancingReceivableModificationPreModificationRecordedInvestment	1610000	USD
CY2017Q3	lkfn	Financing Receivable Modification Post Modification Recorded Investment FinancingReceivableModificationPostModificationRecordedInvestment	1610000	USD
	lkfn	Financing Receivable Modification Pre Modification Recorded Investment FinancingReceivableModificationPreModificationRecordedInvestment	3852000	USD
	lkfn	Financing Receivable Modification Post Modification Recorded Investment FinancingReceivableModificationPostModificationRecordedInvestment	3854000	USD
CY2018Q3	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	182293000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	176172000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	43718000	USD
CY2017Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	45497000	USD
CY2018Q3	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	6034000	USD
CY2018Q3	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	20910000	USD
CY2017Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	3216000	USD
CY2017Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	13870000	USD
CY2018Q3	lkfn	Loans Receivable Accruing Troubled Debt Restructured Loans LoansReceivableAccruingTroubledDebtRestructuredLoans	3512000	USD
CY2017Q4	lkfn	Loans Receivable Accruing Troubled Debt Restructured Loans LoansReceivableAccruingTroubledDebtRestructuredLoans	2893000	USD
CY2018Q3	lkfn	Financing Receivable Modifications FinancingReceivableModifications	10825000	USD
CY2017Q4	lkfn	Financing Receivable Modifications FinancingReceivableModifications	10643000	USD
CY2018Q3	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	3817302000	USD
CY2018Q3	lkfn	Loans Receivable Recorded Investment30 To89 Days Past Due LoansReceivableRecordedInvestment30To89DaysPastDue	13482000	USD
CY2018Q3	lkfn	Financing Receivable Recorded Investment Past Due And Nonaccrual Status FinancingReceivableRecordedInvestmentPastDueAndNonaccrualStatus	25823000	USD
CY2018Q3	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	3843125000	USD
CY2017Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	3799432000	USD
CY2017Q4	lkfn	Loans Receivable Recorded Investment30 To89 Days Past Due LoansReceivableRecordedInvestment30To89DaysPastDue	9619000	USD
CY2017Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	9402000	USD
CY2017Q4	lkfn	Financing Receivable Recorded Investment Past Due And Nonaccrual Status FinancingReceivableRecordedInvestmentPastDueAndNonaccrualStatus	19027000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	3818459000	USD
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	106700000	USD
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	13843000	USD
CY2018Q3	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	1497000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	1066000	USD
CY2018Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	12341000	USD
	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	761000	USD
	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	964000	USD
	dei	Document Type DocumentType	10-Q
	dei	Amendment Flag AmendmentFlag	false
	dei	Document Period End Date DocumentPeriodEndDate	2018-09-30
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Entity Registrant Name EntityRegistrantName	LAKELAND FINANCIAL CORP
	dei	Entity Central Index Key EntityCentralIndexKey	0000721994
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Trading Symbol TradingSymbol	LKFN
CY2018Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	25301732	shares
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2017Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	129833000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	167280000	USD
	us-gaap	Interest Paid InterestPaid	31130000	USD
	dei	Entity Small Business EntitySmallBusiness	false
CY2018Q3	lkfn	Increase Decrease In Allowance For Loan Loss IncreaseDecreaseInAllowanceForLoanLoss	-7000	USD
	lkfn	Increase Decrease In Allowance For Loan Loss IncreaseDecreaseInAllowanceForLoanLoss	255000	USD
CY2017Q3	lkfn	Increase Decrease In Allowance For Loan Loss IncreaseDecreaseInAllowanceForLoanLoss	-7000	USD
CY2018Q3	lkfn	Derivativeliabilitycollateralrighttoreclaimcashoffsets Derivativeliabilitycollateralrighttoreclaimcashoffsets	0	USD
	lkfn	Increase Decrease In Allowance For Loan Loss IncreaseDecreaseInAllowanceForLoanLoss	80000	USD
	us-gaap	Interest Paid InterestPaid	21274000	USD
CY2018Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	280000	USD
CY2017Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	264000	USD
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	766000	USD
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	735000	USD

Files In Submission

Name	View Source	Status
0000721994-18-000049-index-headers.html	Edgar Link	pending
0000721994-18-000049-index.html	Edgar Link	pending
0000721994-18-000049.txt	Edgar Link	pending
0000721994-18-000049-xbrl.zip	Edgar Link	pending
ex311.htm	Edgar Link	pending
ex312.htm	Edgar Link	pending
ex321.htm	Edgar Link	pending
ex322.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
lkfn-20180930.xml	Edgar Link	completed
lkfn-20180930.xsd	Edgar Link	pending
lkfn-20180930_cal.xml	Edgar Link	unprocessable
lkfn-20180930_def.xml	Edgar Link	unprocessable
lkfn-20180930_lab.xml	Edgar Link	unprocessable
lkfn-20180930_pre.xml	Edgar Link	unprocessable
lkfn10q.htm	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$LKFN
LAKELAND FINANCIAL CORP Stock $lkfn

2018 Q4 Form 10-Q Financial Statement

#000072199418000049 Filed on November 05, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$LKFN LAKELAND FINANCIAL CORP Stock $lkfn

2018 Q4 Form 10-Q Financial Statement

#000072199418000049 Filed on November 05, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$LKFN
LAKELAND FINANCIAL CORP Stock $lkfn