$LKFN
LAKELAND FINANCIAL CORP Stock $lkfn

$lkfn Overview Financials Valuation SEC Filings Company Website

2016 Q4 Form 10-K Financial Statement

#000072199418000014 Filed on March 01, 2018

Income Statement

Concept	2016 Q4	2016 Q3	2016 Q2
Revenue	$36.31M	$35.08M	$34.36M
YoY Change		13.28%	13.42%
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	$1.100M	$1.100M	$1.000M
YoY Change	10.0%	22.22%	11.11%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$5.400M	$5.360M	$5.082M
YoY Change	29.59%	25.97%	20.26%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$20.10M	$19.98M	$18.89M
YoY Change	10.68%	14.79%	10.91%
Income Tax	$6.582M	$6.498M	$6.091M
% Of Pretax Income	32.75%	32.52%	32.24%
Net Earnings	$13.52M	$13.48M	$12.80M
YoY Change	10.06%	16.56%	12.5%
Net Earnings / Revenue	37.24%	38.43%	37.27%
Basic Earnings Per Share	$0.54	$0.54	$0.51
Diluted Earnings Per Share	$0.53	$0.53	$0.50
COMMON SHARES
Basic Shares Outstanding	25.08M shares	25.06M shares	25.05M shares
Diluted Shares Outstanding			25.40M shares

Balance Sheet

Concept	2016 Q4	2016 Q3	2016 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$167.3M	$278.4M
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	$52.10M	$52.20M	$49.10M
YoY Change	11.56%	18.64%	13.2%
Goodwill	$4.970M
YoY Change	0.0%
Intangibles
YoY Change
Long-Term Investments	$5.100M
YoY Change	50.0%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$4.290B	$4.197B	$3.937B
YoY Change	13.91%	14.48%	10.22%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$5.700M	$5.100M	$4.400M
YoY Change	50.0%	37.84%	12.82%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$230.0M	$60.20M	$56.37M
YoY Change	64.76%	-25.12%	-55.48%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$5.700M	$5.100M	$4.400M
YoY Change	50.0%	37.84%	12.82%
LONG-TERM LIABILITIES
Long-Term Debt	$30.90M	$30.90M	$30.90M
YoY Change	0.0%	0.0%	0.0%
Other Long-Term Liabilities	$18.40M	$21.70M	$23.20M
YoY Change	17.95%	28.4%	57.82%
Total Long-Term Liabilities	$49.30M	$52.60M	$54.10M
YoY Change	6.02%	10.04%	18.64%
TOTAL LIABILITIES
Total Short-Term Liabilities	$5.700M	$5.100M	$4.400M
Total Long-Term Liabilities	$49.30M	$52.60M	$54.10M
Total Liabilities	$3.863B	$3.770B	$3.519B
YoY Change	14.51%	14.95%	10.08%
SHAREHOLDERS EQUITY
Retained Earnings	$327.9M
YoY Change	11.52%
Common Stock	$104.4M
YoY Change	5.33%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$2.913M
YoY Change	18.66%
Treasury Stock Shares	158.2K shares	157.4K shares	151.0K shares
Shareholders Equity	$427.0M	$427.3M	$418.8M
YoY Change
Total Liabilities & Shareholders Equity	$4.290B	$4.197B	$3.937B
YoY Change	13.91%	14.48%	10.22%

Cashflow Statement

Concept	2016 Q4	2016 Q3	2016 Q2
OPERATING ACTIVITIES
Net Income	$13.52M	$13.48M	$12.80M
YoY Change	10.06%	16.56%	12.5%
Depreciation, Depletion And Amortization	$1.100M	$1.100M	$1.000M
YoY Change	10.0%	22.22%	11.11%
Cash From Operating Activities	$12.70M	$14.70M	$16.30M
YoY Change	0.0%	-11.98%	64.65%
INVESTING ACTIVITIES
Capital Expenditures	-$1.200M	-$4.100M	-$1.600M
YoY Change	-66.67%	78.26%	-15.79%
Acquisitions
YoY Change
Other Investing Activities	-$213.9M	-$89.00M	-$96.50M
YoY Change	81.89%	7.36%	-19.45%
Cash From Investing Activities	-$215.1M	-$93.10M	-$98.00M
YoY Change	77.48%	9.27%	-19.47%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	91.40M	247.9M	109.8M
YoY Change	0.22%	221.53%	24.63%
NET CHANGE
Cash From Operating Activities	12.70M	14.70M	16.30M
Cash From Investing Activities	-215.1M	-93.10M	-98.00M
Cash From Financing Activities	91.40M	247.9M	109.8M
Net Change In Cash	-111.0M	169.5M	28.10M
YoY Change	541.62%	1870.93%	-218.57%
FREE CASH FLOW
Cash From Operating Activities	$12.70M	$14.70M	$16.30M
Capital Expenditures	-$1.200M	-$4.100M	-$1.600M
Free Cash Flow	$13.90M	$18.80M	$17.90M
YoY Change	-14.72%	-1.05%	51.69%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2017	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2017	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2017	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2017	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2017Q2	dei	Entity Public Float EntityPublicFloat	1091976162	USD
CY2017	dei	Trading Symbol TradingSymbol	LKFN
CY2018Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	25286064	shares
CY2017Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group Commercial Real Estate LoansReceivableHeldForSaleNetNotPartOfDisposalGroupCommercialRealEstate	3346000	USD
CY2016Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group Commercial Real Estate LoansReceivableHeldForSaleNetNotPartOfDisposalGroupCommercialRealEstate	5915000	USD
CY2017Q4	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	13772000	USD
CY2016Q4	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	11522000	USD
CY2017Q4	us-gaap	Interest Receivable InterestReceivable	14093000	USD
CY2016Q4	us-gaap	Interest Receivable InterestReceivable	11687000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	4970000	USD
CY2017Q4	us-gaap	Subordinated Debt SubordinatedDebt	30928000	USD
CY2016Q4	us-gaap	Subordinated Debt SubordinatedDebt	30928000	USD
CY2017Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	6311000	USD
CY2016Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	5676000	USD
CY2017Q4	us-gaap	Other Liabilities OtherLiabilities	17733000	USD
CY2016Q4	us-gaap	Other Liabilities OtherLiabilities	18365000	USD
CY2017Q4	us-gaap	Liabilities Liabilities	4214309000	USD
CY2016Q4	us-gaap	Liabilities Liabilities	3862958000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	363794000	USD
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	327873000	USD
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	108862000	USD
CY2016Q4	us-gaap	Common Stock Value CommonStockValue	104405000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-670000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-2387000	USD
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	3408000	USD
CY2016Q4	us-gaap	Treasury Stock Value TreasuryStockValue	2913000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	4970000	USD
CY2017Q4	us-gaap	Other Assets OtherAssets	28439000	USD
CY2016Q4	us-gaap	Other Assets OtherAssets	31153000	USD
CY2017Q4	us-gaap	Assets Assets	4682976000	USD
CY2016Q4	us-gaap	Assets Assets	4290025000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	468578000	USD
CY2017Q4	us-gaap	Minority Interest MinorityInterest	89000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	468667000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4682976000	USD
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CY2015	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	122539000	USD
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CY2015	us-gaap	Interest Expense Deposits InterestExpenseDeposits	15415000	USD
CY2017	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	1446000	USD
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CY2015	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	188000	USD
CY2017	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	1334000	USD
CY2016	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	1174000	USD
CY2015	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	1009000	USD
CY2017	us-gaap	Interest Expense InterestExpense	29806000	USD
CY2016	us-gaap	Interest Expense InterestExpense	20470000	USD
CY2015	us-gaap	Interest Expense InterestExpense	16612000	USD
CY2017	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	135892000	USD
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CY2015	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	105927000	USD
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CY2015	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	0	USD
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CY2016	us-gaap	Fees And Commissions Fiduciary And Trust Activities FeesAndCommissionsFiduciaryAndTrustActivities	4805000	USD
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CY2015	us-gaap	Occupancy Net OccupancyNet	3820000	USD
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CY2016	us-gaap	Equipment Expense EquipmentExpense	3850000	USD
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CY2017	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	8233000	USD
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CY2015	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	7592000	USD
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CY2016	lkfn	Corporate And Business Development Expense CorporateAndBusinessDevelopmentExpense	3328000	USD
CY2015	lkfn	Corporate And Business Development Expense CorporateAndBusinessDevelopmentExpense	3173000	USD
CY2017	lkfn	Regulatory Fees And Federal Deposit Insurance Corporation Insurance RegulatoryFeesAndFederalDepositInsuranceCorporationInsurance	1798000	USD
CY2016	lkfn	Regulatory Fees And Federal Deposit Insurance Corporation Insurance RegulatoryFeesAndFederalDepositInsuranceCorporationInsurance	2001000	USD
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CY2016	us-gaap	Professional Fees ProfessionalFees	3208000	USD
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CY2016	us-gaap	Other Noninterest Expense OtherNoninterestExpense	6243000	USD
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CY2015	us-gaap	Noninterest Expense NoninterestExpense	68206000	USD
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CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.08
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CY2017	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	54188000	USD
CY2016	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	2047000	USD
CY2015	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	91810000	USD
CY2017	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	139252000	USD
CY2016	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	3390000	USD
CY2015	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	2629000	USD
CY2015	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	1650000	USD
CY2017	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	1749000	USD
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CY2015	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	63601000	USD
CY2017	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	57621000	USD
CY2016	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-160000	USD
CY2015	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-7000	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-79000	USD
CY2016	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-2860000	USD
CY2015	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-4464000	USD
CY2017	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-3114000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	4210000	USD
CY2015	us-gaap	Share Based Compensation ShareBasedCompensation	2535000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	5698000	USD
CY2016	lkfn	Earning On Life Insurance EarningOnLifeInsurance	1392000	USD
CY2015	lkfn	Earning On Life Insurance EarningOnLifeInsurance	1338000	USD
CY2017	lkfn	Earning On Life Insurance EarningOnLifeInsurance	1768000	USD
CY2016	lkfn	Deferred Tax Benefit From Stock Options Exercised DeferredTaxBenefitFromStockOptionsExercised	669000	USD
CY2015	lkfn	Deferred Tax Benefit From Stock Options Exercised DeferredTaxBenefitFromStockOptionsExercised	148000	USD
CY2017	lkfn	Deferred Tax Benefit From Stock Options Exercised DeferredTaxBenefitFromStockOptionsExercised	964000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	2584000	USD
CY2016	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	10115000	USD
CY2015	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	9414000	USD
CY2017	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	19912000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	62199000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	55781000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	77242000	USD
CY2016	us-gaap	Increase Decrease In Operating Assets IncreaseDecreaseInOperatingAssets	1386000	USD
CY2016	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	69343000	USD
CY2015	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	74679000	USD
CY2017	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	61745000	USD
CY2016	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	116196000	USD
CY2017	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	580000	USD
CY2015	us-gaap	Increase Decrease In Operating Assets IncreaseDecreaseInOperatingAssets	398000	USD
CY2017	us-gaap	Increase Decrease In Operating Assets IncreaseDecreaseInOperatingAssets	-787000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	3757000	USD
CY2015	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	2466000	USD
CY2016	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	12095000	USD
CY2015	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	7787000	USD
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	40877000	USD
CY2016	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	391145000	USD
CY2015	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	322114000	USD
CY2017	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	347217000	USD
CY2015	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	701000	USD
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	10000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	9825000	USD
CY2015	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	9167000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	9582000	USD
CY2016	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	0	USD
CY2015	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	1745000	USD
CY2017	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	0	USD
CY2016	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	136000	USD
CY2015	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	963000	USD
CY2017	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	199000	USD
CY2016	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	394491000	USD
CY2015	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	310301000	USD
CY2017	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	430743000	USD
CY2016	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-19577000	USD
CY2015	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-55785000	USD
CY2017	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	100607000	USD
CY2016	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	70002000	USD
CY2015	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	35001000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	275002000	USD
CY2016	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	18200000	USD
CY2015	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	15697000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	21396000	USD
CY2016	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	28000	USD
CY2016	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	360000	USD
CY2015	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	738000	USD
CY2017	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-442448000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-339107000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-396050000	USD
CY2015	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-9964000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	8900000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	80674000	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	90638000	USD
CY2016	us-gaap	Interest Paid InterestPaid	18567000	USD
CY2015	us-gaap	Interest Paid InterestPaid	15786000	USD
CY2017	us-gaap	Interest Paid InterestPaid	29171000	USD
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	21613000	USD
CY2015	us-gaap	Income Taxes Paid IncomeTaxesPaid	21566000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	29120000	USD
CY2016	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	105000	USD
CY2015	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	853000	USD
CY2017	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	88000	USD
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	458000	USD
CY2015	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	455000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	495000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	466855000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	273362000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	327708000	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	86606000	USD
CY2016	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	13000	USD
CY2015	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	13000	USD
CY2017	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	13000	USD
CY2015	us-gaap	Amortization Of Mortgage Servicing Rights Ms Rs AmortizationOfMortgageServicingRightsMSRs	553000	USD
CY2017	us-gaap	Amortization Of Mortgage Servicing Rights Ms Rs AmortizationOfMortgageServicingRightsMSRs	599000	USD
CY2016	us-gaap	Amortization Of Mortgage Servicing Rights Ms Rs AmortizationOfMortgageServicingRightsMSRs	598000	USD
CY2017	lkfn	Securities Purchase Not Settled SecuritiesPurchaseNotSettled	0	USD
CY2016	lkfn	Securities Purchase Not Settled SecuritiesPurchaseNotSettled	1459000	USD
CY2015	lkfn	Securities Purchase Not Settled SecuritiesPurchaseNotSettled	0	USD
CY2017	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	2250000	USD
CY2016	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	3854000	USD
CY2015	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	0	USD
CY2017	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	3000000	USD
CY2017	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	18570000	USD
CY2015	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	0	USD
CY2017Q4	lkfn	Accrued Interest On Loans AccruedInterestOnLoans	11000000	USD
CY2016Q4	lkfn	Accrued Interest On Loans AccruedInterestOnLoans	8900000	USD
CY2017Q4	us-gaap	Equity Method Investments EquityMethodInvestments	5300000	USD
CY2016Q4	us-gaap	Equity Method Investments EquityMethodInvestments	5100000	USD
CY2016Q4	us-gaap	Cash Available For Distributions CashAvailableForDistributions	1300000	USD
CY2016Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	153000	USD
CY2017Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	40000	USD
CY2017Q4	us-gaap	Mortgage Loans On Real Estate Carrying Amount Of Mortgages MortgageLoansOnRealEstateCarryingAmountOfMortgages	3000000	USD
CY2016Q4	us-gaap	Mortgage Loans On Real Estate Carrying Amount Of Mortgages MortgageLoansOnRealEstateCarryingAmountOfMortgages	2700000	USD
CY2017Q4	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	344400000	USD
CY2016Q4	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	341000000	USD
CY2017Q4	us-gaap	Escrow Deposit EscrowDeposit	1500000	USD
CY2017	us-gaap	Contractually Specified Servicing Fees Amount ContractuallySpecifiedServicingFeesAmount	1000000	USD
CY2016	us-gaap	Contractually Specified Servicing Fees Amount ContractuallySpecifiedServicingFeesAmount	987000	USD
CY2015	us-gaap	Contractually Specified Servicing Fees Amount ContractuallySpecifiedServicingFeesAmount	957000	USD
CY2017Q4	lkfn	Treasury Stock Share TreasuryStockShare	168970	shares
CY2016Q4	lkfn	Treasury Stock Share TreasuryStockShare	158222	shares
CY2017Q4	lkfn	Operating Lease Obligations OperatingLeaseObligations	5200000	USD
CY2017Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	537416000	USD
CY2016Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	505327000	USD
CY2017Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	5169000	USD
CY2016Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	5411000	USD
CY2017Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	4092000	USD
CY2016Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	6547000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	1576000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	23698000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	37762000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	115522000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	358858000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	1578000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	24070000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	38502000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	116358000	USD
CY2017Q4	us-gaap	Mortgage Backed Securities Available For Sale Fair Value Disclosure MortgageBackedSecuritiesAvailableForSaleFairValueDisclosure	357985000	USD
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	40877000	USD
CY2016	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	12095000	USD
CY2017	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	267000	USD
CY2016	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	83000	USD
CY2017	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	235000	USD
CY2016	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	17000	USD
CY2015	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	7787000	USD
CY2015	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	42000	USD
CY2015	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	0	USD
CY2017Q4	us-gaap	Available For Sale Securities Pledged As Collateral AvailableForSaleSecuritiesPledgedAsCollateral	171100000	USD
CY2016Q4	us-gaap	Available For Sale Securities Pledged As Collateral AvailableForSaleSecuritiesPledgedAsCollateral	168300000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	177277000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	262423000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	111345000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	9441000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	288622000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	1537000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	6143000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	2555000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	404000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	4092000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	6547000	USD
CY2017Q4	lkfn	Number Of Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosurem Number Of Positions Less Than12 Months NumberOfAvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosuremNumberOfPositionsLessThan12Months	69	pure
CY2016Q4	lkfn	Number Of Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosurem Number Of Positions Less Than12 Months NumberOfAvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosuremNumberOfPositionsLessThan12Months	181	pure
CY2017Q4	lkfn	Number Of Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosurem Number Of Positions12 Months Or More NumberOfAvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosuremNumberOfPositions12MonthsOrMore	84	pure
CY2016Q4	lkfn	Number Of Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosurem Number Of Positions12 Months Or More NumberOfAvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosuremNumberOfPositions12MonthsOrMore	6	pure
CY2017Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	153	pure
CY2016Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	187	pure
CY2017Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	1066000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	741000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	3819525000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	3471668000	USD
CY2017Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	47000	USD
CY2017	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	1560000	USD
CY2017	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	1963000	USD
CY2017	lkfn	Allowance For Loan And Lease Losses Write Offs After Recoveries AllowanceForLoanAndLeaseLossesWriteOffsAfterRecoveries	-403000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	47121000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	43718000	USD
CY2015	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	3173000	USD
CY2015	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	521000	USD
CY2015	lkfn	Allowance For Loan And Lease Losses Write Offs After Recoveries AllowanceForLoanAndLeaseLossesWriteOffsAfterRecoveries	2652000	USD
CY2015Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	43610000	USD
CY2014Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	46262000	USD
CY2016	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	2055000	USD
CY2016	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	1013000	USD
CY2016	lkfn	Allowance For Loan And Lease Losses Write Offs After Recoveries AllowanceForLoanAndLeaseLossesWriteOffsAfterRecoveries	1042000	USD
CY2017Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	3216000	USD
CY2017Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	43905000	USD
CY2017Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	13870000	USD
CY2017Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	3804589000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	3818459000	USD
CY2016Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	4114000	USD
CY2016Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	39604000	USD
CY2016Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	20692000	USD
CY2016Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	3450235000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	3470927000	USD
CY2017Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	15897000	USD
CY2017Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	13870000	USD
CY2016Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	23663000	USD
CY2016Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	20692000	USD
CY2017	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	584000	USD
CY2017	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	549000	USD
CY2016	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	19067000	USD
CY2016	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	582000	USD
CY2016	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	566000	USD
CY2015	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	25344000	USD
CY2015	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	558000	USD
CY2015	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	569000	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
CY2016Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	3462648000	USD
CY2016Q4	lkfn	Loans Receivable Recorded Investment30 To89 Days Past Due LoansReceivableRecordedInvestment30To89DaysPastDue	1593000	USD
CY2016Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	6633000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	30000	USD
CY2017Q4	us-gaap	Other Short Term Borrowings OtherShortTermBorrowings	80000000	USD
CY2016Q4	us-gaap	Other Short Term Borrowings OtherShortTermBorrowings	180000000	USD
CY2017Q4	us-gaap	Federal Home Loan Bank Advances Premium FederalHomeLoanBankAdvancesPremium	80000000	USD
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	USD
CY2016Q4	lkfn	Pledged Financial Instruments Not Separately Reported Residential Mortgage Loans And Mortgage Related Securities Available For Sale For Federal Home Bank Debt PledgedFinancialInstrumentsNotSeparatelyReportedResidentialMortgageLoansAndMortgageRelatedSecuritiesAvailableForSaleForFederalHomeBankDebt	337600000	USD
CY2017Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	10400000	USD
CY2017Q4	us-gaap	Secured Debt SecuredDebt	80000000	USD
CY2017Q4	lkfn	Loans Modified In Troubled Debt Restructured Loans LoansModifiedInTroubledDebtRestructuredLoans	2300000	USD
CY2016Q4	lkfn	Loans Modified In Troubled Debt Restructured Loans LoansModifiedInTroubledDebtRestructuredLoans	2700000	USD
CY2017Q4	lkfn	Loans Receivable Accruing Troubled Debt Restructured Loans LoansReceivableAccruingTroubledDebtRestructuredLoans	2893000	USD
CY2016Q4	lkfn	Loans Receivable Accruing Troubled Debt Restructured Loans LoansReceivableAccruingTroubledDebtRestructuredLoans	10351000	USD
CY2017Q4	lkfn	Loans Receivable Nonaccrual Troubled Debt Restructured Loans LoansReceivableNonaccrualTroubledDebtRestructuredLoans	7750000	USD
CY2016Q4	lkfn	Loans Receivable Nonaccrual Troubled Debt Restructured Loans LoansReceivableNonaccrualTroubledDebtRestructuredLoans	5633000	USD
CY2017Q4	lkfn	Financing Receivable Modifications FinancingReceivableModifications	10643000	USD
CY2016Q4	lkfn	Financing Receivable Modifications FinancingReceivableModifications	15984000	USD
CY2017	lkfn	Loan Amount Of Credit Quality Analysis LoanAmountOfCreditQualityAnalysis	150000	USD
CY2017	lkfn	Financing Receivable Modification Subsequent Default Number Of Contracts FinancingReceivableModificationSubsequentDefaultNumberOfContracts	0	Number
CY2015	lkfn	Financing Receivable Modification Subsequent Default Number Of Contracts FinancingReceivableModificationSubsequentDefaultNumberOfContracts	1	Number
CY2016	lkfn	Financing Receivable Modification Subsequent Default Number Of Contracts FinancingReceivableModificationSubsequentDefaultNumberOfContracts	0	Number
CY2017	lkfn	Financing Receivable Modification Subsequent Default Recorded Investment FinancingReceivableModificationSubsequentDefaultRecordedInvestment	0	USD
CY2016	lkfn	Financing Receivable Modification Subsequent Default Recorded Investment FinancingReceivableModificationSubsequentDefaultRecordedInvestment	0	USD
CY2015	lkfn	Financing Receivable Modification Subsequent Default Recorded Investment FinancingReceivableModificationSubsequentDefaultRecordedInvestment	755000	USD
CY2017Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	4100000	USD
CY2017	us-gaap	Mortgage Loans On Real Estate Interest Rate MortgageLoansOnRealEstateInterestRate	0.0381	pure
CY2017	lkfn	Weighted Average Maturity Of Residential Mortgages WeightedAverageMaturityOfResidentialMortgages	P19Y
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	pure
CY2016	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Qualitative Information ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueQualitativeInformation	162
CY2016	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Discount Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate	0.093	pure
CY2017Q4	us-gaap	Land Land	16172000	USD
CY2016Q4	us-gaap	Land Land	14799000	USD
CY2017Q4	lkfn	Premises Gross PremisesGross	41694000	USD
CY2016Q4	lkfn	Premises Gross PremisesGross	39722000	USD
CY2017Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	34349000	USD
CY2016Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	29274000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	92215000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	83795000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	35749000	USD
CY2016Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	31703000	USD
CY2017Q4	us-gaap	Goodwill Gross GoodwillGross	5000000	USD
CY2017Q4	lkfn	Borrowing Capacity Federal Home Loan Bank BorrowingCapacityFederalHomeLoanBank	800000000	USD
CY2017Q4	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	161700000	USD
CY2017Q4	lkfn	Pledged Financial Instruments Not Separately Reported Commerical Loans For Federal Reserve Bank Debt PledgedFinancialInstrumentsNotSeparatelyReportedCommericalLoansForFederalReserveBankDebt	282100000	USD
CY2017Q4	lkfn	Borrowing Capacity Federal Reserve Bank BorrowingCapacityFederalReserveBank	220500000	USD
CY2015Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	69622000	USD
CY2017Q4	lkfn	Securities Sold Under Agreements To Repurchase Weighted Average Interest Rate SecuritiesSoldUnderAgreementsToRepurchaseWeightedAverageInterestRate	0.0046	pure
CY2016Q4	lkfn	Securities Sold Under Agreements To Repurchase Weighted Average Interest Rate SecuritiesSoldUnderAgreementsToRepurchaseWeightedAverageInterestRate	0.0029	pure
CY2015Q4	lkfn	Securities Sold Under Agreements To Repurchase Weighted Average Interest Rate SecuritiesSoldUnderAgreementsToRepurchaseWeightedAverageInterestRate	0.0021	pure
CY2017Q4	lkfn	Securities Sold Under Agreements To Repurchase Maximum Month End Balance SecuritiesSoldUnderAgreementsToRepurchaseMaximumMonthEndBalance	77886000	USD
CY2016Q4	lkfn	Securities Sold Under Agreements To Repurchase Maximum Month End Balance SecuritiesSoldUnderAgreementsToRepurchaseMaximumMonthEndBalance	60198000	USD
CY2015Q4	lkfn	Securities Sold Under Agreements To Repurchase Maximum Month End Balance SecuritiesSoldUnderAgreementsToRepurchaseMaximumMonthEndBalance	82817000	USD
CY2017	lkfn	Securities Sold Under Agreements To Repurchase Average Daily Balance SecuritiesSoldUnderAgreementsToRepurchaseAverageDailyBalance	63379000	USD
CY2017	lkfn	Securities Sold Under Agreements To Repurchase Average Interest Rate SecuritiesSoldUnderAgreementsToRepurchaseAverageInterestRate	0.0039	pure
CY2016	lkfn	Securities Sold Under Agreements To Repurchase Average Daily Balance SecuritiesSoldUnderAgreementsToRepurchaseAverageDailyBalance	57945000	USD
CY2015	lkfn	Securities Sold Under Agreements To Repurchase Average Daily Balance SecuritiesSoldUnderAgreementsToRepurchaseAverageDailyBalance	63880000	USD
CY2016	lkfn	Securities Sold Under Agreements To Repurchase Average Interest Rate SecuritiesSoldUnderAgreementsToRepurchaseAverageInterestRate	0.0025	pure
CY2015	lkfn	Securities Sold Under Agreements To Repurchase Average Interest Rate SecuritiesSoldUnderAgreementsToRepurchaseAverageInterestRate	0.0019	pure
CY2016	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	311000	USD
CY2015	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	241000	USD
CY2017	us-gaap	Income Tax Reconciliation Deductions Other IncomeTaxReconciliationDeductionsOther	619000	USD
CY2016	us-gaap	Income Tax Reconciliation Deductions Other IncomeTaxReconciliationDeductionsOther	554000	USD
CY2015	us-gaap	Income Tax Reconciliation Deductions Other IncomeTaxReconciliationDeductionsOther	605000	USD
CY2017	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-52000	USD
CY2016	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-85000	USD
	us-gaap	Proceeds From Issuance Of Trust Preferred Securities ProceedsFromIssuanceOfTrustPreferredSecurities	30000000	USD
	lkfn	Proceeds From Issuance Of Subordinated Debentures ProceedsFromIssuanceOfSubordinatedDebentures	30900000	USD
	lkfn	Investment In Common Stock InvestmentInCommonStock	928000	USD
CY2017Q4	lkfn	Integral Multiple Subordinated Debentures May Be Redeemed In IntegralMultipleSubordinatedDebenturesMayBeRedeemedIn	1000	USD
CY2017Q4	lkfn	Percentage Of Principal Amount Subordinated Debentures May Be Redeemed At PercentageOfPrincipalAmountSubordinatedDebenturesMayBeRedeemedAt	1	pure
CY2017Q4	lkfn	Trust Preferred Securities And Subordinated Debentures Floating Rate Of Interest TrustPreferredSecuritiesAndSubordinatedDebenturesFloatingRateOfInterest	0.044745	pure
CY2016Q4	lkfn	Trust Preferred Securities And Subordinated Debentures Floating Rate Of Interest TrustPreferredSecuritiesAndSubordinatedDebenturesFloatingRateOfInterest	0.040479	pure
CY2015Q4	lkfn	Trust Preferred Securities And Subordinated Debentures Floating Rate Of Interest TrustPreferredSecuritiesAndSubordinatedDebenturesFloatingRateOfInterest	0.036567	pure
CY2017	lkfn	Potential Cash Payments Under Employment Agreements PotentialCashPaymentsUnderEmploymentAgreements	4900000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	27064000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	23749000	USD
CY2015	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	19992000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-199000	USD
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	268000	USD
CY2015	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	1378000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1559000	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1086000	USD
CY2015	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1257000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-257000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	30000	USD
CY2015	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	206000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	31372000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	27026000	USD
CY2015	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	24220000	USD
CY2017	lkfn	Interest Income Securitie Tax Exempt InterestIncomeSecuritieTaxExempt	2015000	USD
CY2016	lkfn	Interest Income Securitie Tax Exempt InterestIncomeSecuritieTaxExempt	1498000	USD
CY2015	lkfn	Interest Income Securitie Tax Exempt InterestIncomeSecuritieTaxExempt	1323000	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	193000	USD
CY2016	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	190000	USD
CY2015	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	206000	USD
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	846000	USD
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	726000	USD
CY2015	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	951000	USD
CY2017	lkfn	Income Tax Reconciliation Deductions Captive Insurance Premium Income IncomeTaxReconciliationDeductionsCaptiveInsurancePremiumIncome	378000	USD
CY2016	lkfn	Income Tax Reconciliation Deductions Captive Insurance Premium Income IncomeTaxReconciliationDeductionsCaptiveInsurancePremiumIncome	361000	USD
CY2015	lkfn	Income Tax Reconciliation Deductions Captive Insurance Premium Income IncomeTaxReconciliationDeductionsCaptiveInsurancePremiumIncome	363000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	326000	USD
CY2015	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-12000	USD
CY2017Q4	lkfn	Deferred Tax Assets Bad Debts DeferredTaxAssetsBadDebts	12043000	USD
CY2016Q4	lkfn	Deferred Tax Assets Bad Debts DeferredTaxAssetsBadDebts	17187000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	1028000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	1310000	USD
CY2017Q4	lkfn	Deferred Tax Assets Non Qualified Stock Options DeferredTaxAssetsNonQualifiedStockOptions	4000	USD
CY2016Q4	lkfn	Deferred Tax Assets Non Qualified Stock Options DeferredTaxAssetsNonQualifiedStockOptions	38000	USD
CY2017Q4	lkfn	Deferred Tax Assets Nonaccrual Loan Interest DeferredTaxAssetsNonaccrualLoanInterest	970000	USD
CY2016Q4	lkfn	Deferred Tax Assets Nonaccrual Loan Interest DeferredTaxAssetsNonaccrualLoanInterest	2061000	USD
CY2017Q4	lkfn	Deferred Tax Assets Long Term Incentive Plan DeferredTaxAssetsLongTermIncentivePlan	2043000	USD
CY2016Q4	lkfn	Deferred Tax Assets Long Term Incentive Plan DeferredTaxAssetsLongTermIncentivePlan	2348000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	399000	USD
CY2015Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	119963000	USD
CY2017	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	79570000	USD
CY2016	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	96724000	USD
CY2017	lkfn	Effect Of Changes In Related Parties EffectOfChangesInRelatedParties	-66000	USD
CY2016	lkfn	Effect Of Changes In Related Parties EffectOfChangesInRelatedParties	0	USD
CY2017	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	92567000	USD
CY2016	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	98382000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	105242000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	450000	USD
CY2017Q4	lkfn	Deferred Tax Liabilities Accretion DeferredTaxLiabilitiesAccretion	28000	USD
CY2016Q4	lkfn	Deferred Tax Liabilities Accretion DeferredTaxLiabilitiesAccretion	121000	USD
CY2017Q4	lkfn	Deferred Tax Liabilities Depreciation DeferredTaxLiabilitiesDepreciation	3614000	USD
CY2016Q4	lkfn	Deferred Tax Liabilities Depreciation DeferredTaxLiabilitiesDepreciation	4952000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	793000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	1174000	USD
CY2017Q4	lkfn	Deferred Tax Liabilities State Taxes DeferredTaxLiabilitiesStateTaxes	426000	USD
CY2016Q4	lkfn	Deferred Tax Liabilities State Taxes DeferredTaxLiabilitiesStateTaxes	620000	USD
CY2017Q4	lkfn	Deferred Tax Liabilities Deferred Loan Fees DeferredTaxLiabilitiesDeferredLoanFees	0	USD
CY2016Q4	lkfn	Deferred Tax Liabilities Deferred Loan Fees DeferredTaxLiabilitiesDeferredLoanFees	78000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	1261000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	1925000	USD
CY2017Q4	lkfn	Deferred Tax Liabilities Spill Over Dividend DeferredTaxLiabilitiesSpillOverDividend	1242000	USD
CY2016Q4	lkfn	Deferred Tax Liabilities Spill Over Dividend DeferredTaxLiabilitiesSpillOverDividend	1479000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	752000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	959000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	384000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	418000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2016Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2017Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	7987000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	11668000	USD
CY2017Q4	lkfn	Deferred Tax Liabilities Allocated To Benefit Plan DeferredTaxLiabilitiesAllocatedToBenefitPlan	625000	USD
CY2016Q4	lkfn	Deferred Tax Assets Unrealized Gain Losses On Available For Sale Securities Gross DeferredTaxAssetsUnrealizedGainLossesOnAvailableForSaleSecuritiesGross	386000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	118305000	USD
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	9000	shares
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2017	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	1500	shares
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	0	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	7500	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	7500	shares
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	16.03
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	16.03
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	0
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	16.03
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	16.03
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4M24D
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P4M24D
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	243000	USD
CY2017Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	243000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	44000	USD
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	755000	USD
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	577000	USD
CY2017	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	24000	USD
CY2016	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	625000	USD
CY2017	us-gaap	Loans And Leases Receivable Commitments Fixed Rates LoansAndLeasesReceivableCommitmentsFixedRates	61585000	USD
CY2016	us-gaap	Loans And Leases Receivable Commitments Fixed Rates LoansAndLeasesReceivableCommitmentsFixedRates	53296000	USD
CY2017	us-gaap	Loans And Leases Receivable Commitments Variable Rates LoansAndLeasesReceivableCommitmentsVariableRates	1462624000	USD
CY2016	us-gaap	Loans And Leases Receivable Commitments Variable Rates LoansAndLeasesReceivableCommitmentsVariableRates	1421340000	USD
CY2017	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	219273	shares
CY2016	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	184205	shares
CY2015	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	156563	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	262900	shares
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	220427	shares
CY2015	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	162652	shares
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	13000	USD
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	USD
CY2017	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-142000	USD
CY2017Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	44161000	USD
CY2017Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	42589000	USD
CY2017Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	40821000	USD
CY2017Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	38127000	USD
CY2017Q4	us-gaap	Interest Expense InterestExpense	8769000	USD
CY2017Q3	us-gaap	Interest Expense InterestExpense	7969000	USD
CY2015	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	559000	USD
CY2015	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	148000	USD
CY2016	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	669000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	0	USD
CY2017Q4	us-gaap	Statutory Accounting Practices Statutory Amount Available For Dividend Payments StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPayments	73700000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	2441000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	73214000	USD
CY2017Q4	lkfn	Derivative Asset Gross Value Offset DerivativeAssetGrossValueOffset	0	USD
CY2017Q4	lkfn	Derivativeliabilitygrossvalueoffset Derivativeliabilitygrossvalueoffset	0	USD
CY2017Q4	lkfn	Derivative Asset Net Value Offset DerivativeAssetNetValueOffset	2441000	USD
CY2017Q4	lkfn	Derivativeliabilitynetvalueoffset Derivativeliabilitynetvalueoffset	-73214000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	0	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	70652000	USD
CY2017Q4	lkfn	Derivativeassetcollateralobligationtoreturncashnotoffset Derivativeassetcollateralobligationtoreturncashnotoffset	0	USD
CY2017Q4	us-gaap	Derivative Assets DerivativeAssets	2441000	USD
CY2017Q4	lkfn	Derivativeliabilitycollateralrighttoreclaimcashoffsets Derivativeliabilitycollateralrighttoreclaimcashoffsets	750000	USD
CY2017Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	1812000	USD
CY2016Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	2645000	USD
CY2016Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	52780000	USD
CY2016Q4	lkfn	Derivative Asset Gross Value Offset DerivativeAssetGrossValueOffset	0	USD
CY2016Q4	lkfn	Derivativeliabilitygrossvalueoffset Derivativeliabilitygrossvalueoffset	0	USD
CY2016Q4	lkfn	Derivative Asset Net Value Offset DerivativeAssetNetValueOffset	2645000	USD
CY2016Q4	lkfn	Derivativeliabilitynetvalueoffset Derivativeliabilitynetvalueoffset	-52780000	USD
CY2016Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	0	USD
CY2016Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	50045000	USD
CY2016Q4	lkfn	Derivativeassetcollateralobligationtoreturncashnotoffset Derivativeassetcollateralobligationtoreturncashnotoffset	0	USD
CY2016Q4	us-gaap	Derivative Assets DerivativeAssets	2645000	USD
CY2016Q4	lkfn	Derivativeliabilitycollateralrighttoreclaimcashoffsets Derivativeliabilitycollateralrighttoreclaimcashoffsets	1330000	USD
CY2016Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	1405000	USD
CY2017Q2	us-gaap	Interest Expense InterestExpense	7002000	USD
CY2017Q1	us-gaap	Interest Expense InterestExpense	6066000	USD
CY2017Q4	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	1850000	USD
CY2017Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	450000	USD
CY2017Q2	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	500000	USD
CY2017Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	200000	USD
CY2017Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	35392000	USD
CY2017Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	34620000	USD
CY2017Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	33819000	USD
CY2017Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	32061000	USD
CY2017Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	33542000	USD
CY2017Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	34170000	USD
CY2017Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	33319000	USD
CY2017Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	31861000	USD
CY2017Q4	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	9462000	USD
CY2017Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	9497000	USD
CY2017Q2	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	8791000	USD
CY2017Q1	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	8259000	USD
CY2017Q4	us-gaap	Noninterest Expense NoninterestExpense	19598000	USD
CY2017Q3	us-gaap	Noninterest Expense NoninterestExpense	20269000	USD
CY2017Q2	us-gaap	Noninterest Expense NoninterestExpense	19352000	USD
CY2017Q1	us-gaap	Noninterest Expense NoninterestExpense	20048000	USD
CY2017Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7573000	USD
CY2017Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7394000	USD
CY2017Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5558000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	11627000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	15825000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	15364000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	14514000	USD
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	0.6
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.57
CY2017Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11779000	USD
CY2016Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	36307000	USD
CY2016Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	35079000	USD
CY2016Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	34355000	USD
CY2016Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	33210000	USD
CY2016Q4	us-gaap	Interest Expense InterestExpense	5400000	USD
CY2016Q3	us-gaap	Interest Expense InterestExpense	5360000	USD
CY2016Q2	us-gaap	Interest Expense InterestExpense	5082000	USD
CY2016Q1	us-gaap	Interest Expense InterestExpense	4628000	USD
CY2016Q4	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	1150000	USD
CY2016Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	0	USD
CY2016Q2	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	0	USD
CY2016Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	0	USD
CY2016Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	30907000	USD
CY2016Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	29719000	USD
CY2016Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	29273000	USD
CY2016Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	28582000	USD
CY2016Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	29757000	USD
CY2016Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	29719000	USD
CY2016Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	29273000	USD
CY2016Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	28582000	USD
CY2016Q4	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	8736000	USD
CY2016Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	9018000	USD
CY2016Q2	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	8067000	USD
CY2016Q1	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	7043000	USD
CY2009Q1	us-gaap	Share Price SharePrice	17.45
CY2009Q1	us-gaap	Fair Value Assumptions Exercise Price FairValueAssumptionsExercisePrice	21.20
CY2009Q1	us-gaap	Fair Value Assumptions Risk Free Interest Rate FairValueAssumptionsRiskFreeInterestRate	0.0302	pure
CY2016Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	25096087	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	25025933	shares
CY2016Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	24937865	shares
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	168970	shares
CY2016Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	158222	shares
CY2009Q1	us-gaap	Fair Value Assumptions Expected Term FairValueAssumptionsExpectedTerm	P10Y
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1717000	USD
CY2017	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	21409000	USD
CY2016Q4	us-gaap	Noninterest Expense NoninterestExpense	18389000	USD
CY2016Q3	us-gaap	Noninterest Expense NoninterestExpense	18759000	USD
CY2016Q2	us-gaap	Noninterest Expense NoninterestExpense	18446000	USD
CY2016Q1	us-gaap	Noninterest Expense NoninterestExpense	17384000	USD
CY2016Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6498000	USD
CY2016Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6091000	USD
CY2016Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5962000	USD
CY2016Q4	us-gaap	Net Income Loss NetIncomeLoss	13522000	USD
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	13480000	USD
CY2016Q2	us-gaap	Net Income Loss NetIncomeLoss	12803000	USD
CY2016Q1	us-gaap	Net Income Loss NetIncomeLoss	12279000	USD
CY2016Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.54
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.54
CY2016Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.51
CY2016Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.49
CY2016Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.53
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.53
CY2016Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.5
CY2016Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.48
CY2016Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6582000	USD
CY2009Q1	lkfn	Warrant Period WarrantPeriod	P10Y
CY2009Q1	lkfn	Warrant Exercise Price Per Share WarrantExercisePricePerShare	21.20
CY2009Q1	us-gaap	Fair Value Assumptions Expected Dividend Rate FairValueAssumptionsExpectedDividendRate	0.045759	pure
CY2009Q1	us-gaap	Fair Value Assumptions Expected Volatility Rate FairValueAssumptionsExpectedVolatilityRate	0.418046	pure
CY2009Q1	lkfn	Warrant Fair Value Per Share WarrantFairValuePerShare	4.4433
CY2016Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2017Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	90000000	shares
CY2016Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	90000000	shares
CY2017Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2016Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	25194903	shares
CY2017	lkfn	Treasury Shares Purchased Deferred Directors Plan TreasurySharesPurchasedDeferredDirectorsPlan	0	USD
CY2017	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	1736000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	5698000	USD
CY2014Q4	us-gaap	Stockholders Equity StockholdersEquity	361296000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1688000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-4529000	USD
CY2016	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	18213000	USD
CY2015	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	15710000	USD
CY2015	lkfn	Treasury Shares Purchased Deferred Directors Plan TreasurySharesPurchasedDeferredDirectorsPlan	0	USD
CY2016	lkfn	Treasury Shares Purchased Deferred Directors Plan TreasurySharesPurchasedDeferredDirectorsPlan	0	USD
CY2015	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-12000	USD
CY2016	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-614000	USD
CY2015	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2535000	USD
CY2016	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	4210000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	392812000	USD
CY2015	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.63
CY2016	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.73
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.85
CY2016	us-gaap	Stockholders Equity Note Stock Split StockholdersEquityNoteStockSplit	3-for-2
CY2009Q1	lkfn	Issue Of Warrant Stock Purchase IssueOfWarrantStockPurchase	396538	shares
CY2009Q1	lkfn	Issue Of Warrants Aggregate Purchase Price Of Stock IssueOfWarrantsAggregatePurchasePriceOfStock	56044000	USD
CY2017	us-gaap	Use Of Estimates UseOfEstimates	<div style="MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif "> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;CLEAR: both"> </div> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt; FONT-WEIGHT: bold" align="left">Use of Estimates:</div> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;CLEAR: both"> <br/> </div> <div style="CLEAR:both;TEXT-INDENT: 36pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="left">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>
CY2009Q4	lkfn	Adjustments In Share Capital Warrants Issue AdjustmentsInShareCapitalWarrantsIssue	198269	shares
CY2017	lkfn	Shares Issuable Upon Exercise Of Warrants SharesIssuableUponExerciseOfWarrants	310968	shares
CY2017	lkfn	Warrant Exercise Price Per Share WarrantExercisePricePerShare	13.5168
CY2016	lkfn	Shares Issuable Upon Exercise Of Warrants SharesIssuableUponExerciseOfWarrants	308014	shares
CY2016	lkfn	Warrant Exercise Price Per Share WarrantExercisePricePerShare	13.6465
CY2017	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif "> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;CLEAR: both"> </div> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt; FONT-WEIGHT: bold" align="left">Reclassifications:</div> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;CLEAR: both"> <br/> </div> <div style="CLEAR:both;TEXT-INDENT: 36pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="left">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>
CY2017Q4	us-gaap	Notes Receivable Net NotesReceivableNet	150000	USD
CY2017Q4	us-gaap	Cash Available For Distributions CashAvailableForDistributions	1000000	USD
CY2016Q4	us-gaap	Escrow Deposit EscrowDeposit	1500000	USD
CY2017Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	427000	USD
CY2017Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	438000	USD
CY2017Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	464000	USD
CY2017Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	473000	USD
CY2017Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	485000	USD
CY2017Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	2864000	USD
CY2017Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	5151000	USD
CY2017Q4	lkfn	Cash On Hand Or On Deposit Requirement CashOnHandOrOnDepositRequirement	10500000	USD
CY2016Q4	lkfn	Cash On Hand Or On Deposit Requirement CashOnHandOrOnDepositRequirement	11200000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	19000	USD
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	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	26000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	17000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	40000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	25000	USD
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	USD
CY2015	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	244000	USD
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	USD
CY2015	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	97000	USD
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	USD
CY2015	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	147000	USD
CY2016	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-90000	USD
CY2015	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-122000	USD
CY2017Q4	lkfn	Income Tax Benefit Off Setting Income Tax Expense And Current Tax Liability IncomeTaxBenefitOffSettingIncomeTaxExpenseAndCurrentTaxLiability	964000	USD
CY2017Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term OperatingLeaseWeightedAverageRemainingLeaseTerm	P14Y
CY2017	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	412000	USD
CY2016	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	377000	USD
CY2015	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	313000	USD
CY2017Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	973037000	USD
CY2017Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	286705000	USD
CY2017Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	72116000	USD
CY2017Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	56648000	USD
CY2017Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	23971000	USD
CY2017Q4	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	106000	USD
CY2017Q4	us-gaap	Time Deposits TimeDeposits	1412583000	USD
CY2017	us-gaap	Schedule Of Repurchase Agreements ScheduleOfRepurchaseAgreements	<div style="MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif "> <div style="CLEAR:both;TEXT-INDENT: 36pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="left">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.</div> </div><table border="0" style="width:100%; table-layout:fixed;" cellspacing="0" cellpadding="0"><tr><td></td></tr></table><div style="MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif "> </div><div style="MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif "> <table style="width:100%; table-layout:fixed;" cellspacing="0" cellpadding="0"> <tr> <td style="BORDER-BOTTOM: black 2px solid; WIDTH: 54.62%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="left">(dollars in thousands)</div> </td> <td style="BORDER-BOTTOM: #000000 2px solid; TEXT-ALIGN: center; WIDTH: 14.78%; VERTICAL-ALIGN: middle"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt; FONT-WEIGHT: bold"> 2017</div> </td> <td style="WIDTH: 2.26%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt">  </div> </td> <td style="BORDER-BOTTOM: #000000 2px solid; TEXT-ALIGN: center; WIDTH: 11.91%; VERTICAL-ALIGN: middle"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt"> 2016</div> </td> <td style="WIDTH: 2.26%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt">  </div> </td> <td style="BORDER-BOTTOM: #000000 2px solid; TEXT-ALIGN: center; WIDTH: 11.91%; VERTICAL-ALIGN: middle"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt"> 2015</div> </td> <td style="WIDTH: 2.26%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt">  </div> </td> </tr> <tr> <td style="WIDTH: 54.62%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="left">Securities sold under agreements to repurchase</div> </td> <td style="WIDTH: 14.78%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt">  </div> </td> <td style="WIDTH: 2.26%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt">  </div> </td> <td style="WIDTH: 11.91%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt">  </div> </td> <td style="WIDTH: 2.26%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt">  </div> </td> <td style="WIDTH: 11.91%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt">  </div> </td> <td style="WIDTH: 2.26%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt">  </div> </td> </tr> <tr> <td style="BACKGROUND-COLOR: #cceeff; WIDTH: 54.62%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="left">  Outstanding at year end</div> </td> <td style="BACKGROUND-COLOR: #cceeff; WIDTH: 14.78%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt; FONT-WEIGHT: bold" align="right"> $70,652</div> </td> <td style="BACKGROUND-COLOR: #cceeff; WIDTH: 2.26%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt">  </div> </td> <td style="BACKGROUND-COLOR: #cceeff; WIDTH: 11.91%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="right"> $50,045</div> </td> <td style="BACKGROUND-COLOR: #cceeff; WIDTH: 2.26%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt">  </div> </td> <td style="BACKGROUND-COLOR: #cceeff; WIDTH: 11.91%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="right"> $69,622</div> </td> <td style="BACKGROUND-COLOR: #cceeff; WIDTH: 2.26%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt">  </div> </td> </tr> <tr> <td style="BACKGROUND-COLOR: #ffffff; WIDTH: 54.62%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="left">  Approximate average interest rate at year end</div> </td> <td style="BACKGROUND-COLOR: #ffffff; WIDTH: 14.78%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt; FONT-WEIGHT: bold" align="right"> 0.46</div> </td> <td style="BACKGROUND-COLOR: #ffffff; WIDTH: 2.26%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="left">%</div> </td> <td style="BACKGROUND-COLOR: #ffffff; WIDTH: 11.91%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="right"> 0.29</div> </td> <td style="BACKGROUND-COLOR: #ffffff; WIDTH: 2.26%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="left">%</div> </td> <td style="BACKGROUND-COLOR: #ffffff; WIDTH: 11.91%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="right"> 0.21</div> </td> <td style="BACKGROUND-COLOR: #ffffff; WIDTH: 2.26%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="left">%</div> </td> </tr> <tr> <td style="BACKGROUND-COLOR: #cceeff; WIDTH: 54.62%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="left">  Highest amount outstanding as of any month end</div> </td> <td style="BACKGROUND-COLOR: #cceeff; WIDTH: 14.78%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt">  </div> </td> <td style="BACKGROUND-COLOR: #cceeff; WIDTH: 2.26%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt">  </div> </td> <td style="BACKGROUND-COLOR: #cceeff; WIDTH: 11.91%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt">  </div> </td> <td style="BACKGROUND-COLOR: #cceeff; WIDTH: 2.26%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt">  </div> </td> <td style="BACKGROUND-COLOR: #cceeff; WIDTH: 11.91%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt">  </div> </td> <td style="BACKGROUND-COLOR: #cceeff; WIDTH: 2.26%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt">  </div> </td> </tr> <tr> <td style="BACKGROUND-COLOR: #ffffff; WIDTH: 54.62%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="left">    during the year</div> </td> <td style="BACKGROUND-COLOR: #ffffff; WIDTH: 14.78%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt; FONT-WEIGHT: bold" align="right"> $77,886</div> </td> <td style="BACKGROUND-COLOR: #ffffff; WIDTH: 2.26%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt">  </div> </td> <td style="BACKGROUND-COLOR: #ffffff; WIDTH: 11.91%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="right"> $60,198</div> </td> <td style="BACKGROUND-COLOR: #ffffff; WIDTH: 2.26%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt">  </div> </td> <td style="BACKGROUND-COLOR: #ffffff; WIDTH: 11.91%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="right"> $82,817</div> </td> <td style="BACKGROUND-COLOR: #ffffff; WIDTH: 2.26%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt">  </div> </td> </tr> <tr> <td style="BACKGROUND-COLOR: #cceeff; WIDTH: 54.62%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="left">  Approximate average outstanding during the year</div> </td> <td style="BACKGROUND-COLOR: #cceeff; WIDTH: 14.78%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt; FONT-WEIGHT: bold" align="right"> 63,379</div> </td> <td style="BACKGROUND-COLOR: #cceeff; WIDTH: 2.26%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt">  </div> </td> <td style="BACKGROUND-COLOR: #cceeff; WIDTH: 11.91%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="right"> 57,945</div> </td> <td style="BACKGROUND-COLOR: #cceeff; WIDTH: 2.26%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt">  </div> </td> <td style="BACKGROUND-COLOR: #cceeff; WIDTH: 11.91%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="right"> 63,880</div> </td> <td style="BACKGROUND-COLOR: #cceeff; WIDTH: 2.26%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt">  </div> </td> </tr> <tr> <td style="BACKGROUND-COLOR: #ffffff; WIDTH: 54.62%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="left">  Approximate average interest rate during the year</div> </td> <td style="BACKGROUND-COLOR: #ffffff; WIDTH: 14.78%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt; FONT-WEIGHT: bold" align="right"> 0.39</div> </td> <td style="BACKGROUND-COLOR: #ffffff; WIDTH: 2.26%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="left">%</div> </td> <td style="BACKGROUND-COLOR: #ffffff; WIDTH: 11.91%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="right"> 0.25</div> </td> <td style="BACKGROUND-COLOR: #ffffff; WIDTH: 2.26%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="left">%</div> </td> <td style="BACKGROUND-COLOR: #ffffff; WIDTH: 11.91%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="right"> 0.19</div> </td> <td style="BACKGROUND-COLOR: #ffffff; WIDTH: 2.26%; VERTICAL-ALIGN: bottom"> <div style="CLEAR:both;FONT-FAMILY: 'Times New Roman', Times, serif; FONT-SIZE: 10pt" align="left">%</div> </td> </tr> </table> </div><table border="0" style="width:100%; table-layout:fixed;" cellspacing="0" cellpadding="0"><tr><td></td></tr></table>
CY2017	lkfn	Trust Preferred Securities And Subordinated Debentures Description Of Variable Rate Basis TrustPreferredSecuritiesAndSubordinatedDebenturesDescriptionOfVariableRateBasis	("LIBOR") plus 3.05%
CY2017	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	4137000	USD
CY2016	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	0	USD
CY2015	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	0	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	4137000	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	0	USD
CY2015	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	0	USD
CY2017	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 2017 and 2016 is 1.25% and 0.625%, respectively. The net unrealized gain or loss on available for sale securities is not included in computing regulatory capital.
CY2017Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	16487000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	23394000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	8500000	USD
CY2016Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	11726000	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2015	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2016Q4	lkfn	Deferred Tax Liabilities Allocated To Benefit Plan DeferredTaxLiabilitiesAllocatedToBenefitPlan	1100000	USD
CY2017Q4	lkfn	Noncash Nonoperating And Nonrecurring Income Tax Provision NoncashNonoperatingAndNonrecurringIncomeTaxProvision	4100000	USD
CY2017	lkfn	Effective Income Tax Rate Reconciliation Deduction Long Term Incentive Plan Amount EffectiveIncomeTaxRateReconciliationDeductionLongTermIncentivePlanAmount	854000	USD
CY2016	lkfn	Effective Income Tax Rate Reconciliation Deduction Long Term Incentive Plan Amount EffectiveIncomeTaxRateReconciliationDeductionLongTermIncentivePlanAmount	0	USD
CY2015	lkfn	Effective Income Tax Rate Reconciliation Deduction Long Term Incentive Plan Amount EffectiveIncomeTaxRateReconciliationDeductionLongTermIncentivePlanAmount	0	USD
CY2016Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	261005000	USD
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	95000000	USD
CY2016	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	180000000	USD
CY2015	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	70000000	USD
CY2017	lkfn	Proceeds From Repayment Of Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromRepaymentOfIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	-1736000	USD
CY2016	lkfn	Proceeds From Repayment Of Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromRepaymentOfIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	614000	USD
CY2015	lkfn	Proceeds From Repayment Of Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromRepaymentOfIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	12000	USD
CY2016Q4	lkfn	Time Deposits100000 To250000 TimeDeposits100000To250000	212232000	USD
CY2017Q4	lkfn	Timedeposits250000 Ormore Timedeposits250000Ormore	925011000	USD
CY2016Q4	lkfn	Timedeposits250000 Ormore Timedeposits250000Ormore	712593000	USD
CY2017Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	181610000	USD
CY2017Q4	us-gaap	Federal Funds Purchased FederalFundsPurchased	80030000	USD
CY2016Q4	us-gaap	Federal Funds Purchased FederalFundsPurchased	180032000	USD
CY2017Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	263570000	USD
CY2016Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	268970000	USD
CY2017Q4	lkfn	Other Time Deposits OtherTimeDeposits	251218000	USD
CY2016Q4	lkfn	Other Time Deposits OtherTimeDeposits	238994000	USD
CY2017Q4	lkfn	Time Deposits100000 To250000 TimeDeposits100000To250000	236354000	USD
CY2017Q4	lkfn	Available For Sale Securities With Maturities Amortized Cost AvailableForSaleSecuritiesWithMaturitiesAmortizedCost	178558000	USD
CY2017Q4	lkfn	Available For Sale Securities With Maturities Fair Value AvailableForSaleSecuritiesWithMaturitiesFairValue	180508000	USD
CY2017Q4	lkfn	Financing Receivable Recorded Investment Past Due And Nonaccrual Status FinancingReceivableRecordedInvestmentPastDueAndNonaccrualStatus	19027000	USD
CY2016Q4	lkfn	Financing Receivable Recorded Investment Past Due And Nonaccrual Status FinancingReceivableRecordedInvestmentPastDueAndNonaccrualStatus	8279000	USD
CY2015Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	788000	USD
CY2016	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	4200000	USD
CY2015	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	2500000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2200000	USD
CY2016	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1700000	USD
CY2015	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1000000	USD
CY2017	lkfn	Percentage Of Interest Income In Net Revenue PercentageOfInterestIncomeInNetRevenue	0.8	pure
CY2017	lkfn	Percentage Of Noninterest Income In Net Revenue PercentageOfNoninterestIncomeInNetRevenue	0.2	pure
CY2017Q4	lkfn	Deferred Tax Assets Unrealized Gain Losses On Available For Sale Securities Gross DeferredTaxAssetsUnrealizedGainLossesOnAvailableForSaleSecuritiesGross	-226000	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	987178	shares
CY2017	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	5700000	USD
CY2008Q2	lkfn	Share Based Compensation Shares Authorized Under Equity Incentive Plans ShareBasedCompensationSharesAuthorizedUnderEquityIncentivePlans	1125000	shares
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-722000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsAndTax	1525000	USD
CY2017	lkfn	Accumulated Other Comprehensive Income Loss Available For Sale Securities Reclassification Adjustment Included In Net Income Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesReclassificationAdjustmentIncludedInNetIncomeNetOfTax	-19000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1506000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	784000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-1665000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax	50000	USD
CY2017	lkfn	Accumulated Other Comprehensive Income Loss Defined Benefit Pension Reclassification Adjustment Included In Net Income Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionReclassificationAdjustmentIncludedInNetIncomeNetOfTax	161000	USD
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-211000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-1454000	USD
CY2017	lkfn	Other Comprehensive Income Loss Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossAdjustmentBeforeReclassificationAdjustmentsAndTax	1575000	USD
CY2017	lkfn	Accumulated Other Comprehensive Income Loss Reclassification Adjustment Included In Net Income Net Of Tax AccumulatedOtherComprehensiveIncomeLossReclassificationAdjustmentIncludedInNetIncomeNetOfTax	142000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1717000	USD
CY2015Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	3836000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsAndTax	-4518000	USD
CY2016	lkfn	Accumulated Other Comprehensive Income Loss Available For Sale Securities Reclassification Adjustment Included In Net Income Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesReclassificationAdjustmentIncludedInNetIncomeNetOfTax	-40000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-4558000	USD
CY2015Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-1694000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax	-101000	USD
CY2016	lkfn	Accumulated Other Comprehensive Income Loss Defined Benefit Pension Reclassification Adjustment Included In Net Income Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionReclassificationAdjustmentIncludedInNetIncomeNetOfTax	130000	USD
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-29000	USD
CY2015Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	2142000	USD
CY2016	lkfn	Other Comprehensive Income Loss Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossAdjustmentBeforeReclassificationAdjustmentsAndTax	-4619000	USD
CY2016	lkfn	Accumulated Other Comprehensive Income Loss Reclassification Adjustment Included In Net Income Net Of Tax AccumulatedOtherComprehensiveIncomeLossReclassificationAdjustmentIncludedInNetIncomeNetOfTax	90000	USD
CY2015	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	24000	USD
CY2015	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	57000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1688000	USD
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	-35000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-4529000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	97000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-151000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-325000	USD
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	USD
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent	-362000	USD
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent	-64000	USD
CY2015	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent	81000	USD
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	-151000	USD

Files In Submission

Name	View Source	Status
0000721994-18-000014-index-headers.html	Edgar Link	pending
0000721994-18-000014-index.html	Edgar Link	pending
0000721994-18-000014.txt	Edgar Link	pending
0000721994-18-000014-xbrl.zip	Edgar Link	pending
ex231.htm	Edgar Link	pending
ex311.htm	Edgar Link	pending
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ex322.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
image2.jpg	Edgar Link	pending
lkfn-20171231.xml	Edgar Link	completed
lkfn-20171231.xsd	Edgar Link	pending
lkfn-20171231_cal.xml	Edgar Link	unprocessable
lkfn-20171231_def.xml	Edgar Link	unprocessable
lkfn-20171231_lab.xml	Edgar Link	unprocessable
lkfn-20171231_pre.xml	Edgar Link	unprocessable
lkfn10k.htm	Edgar Link	pending
lkfn10k.pdf	Edgar Link	pending
R1.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$LKFN
LAKELAND FINANCIAL CORP Stock $lkfn

2016 Q4 Form 10-K Financial Statement

#000072199418000014 Filed on March 01, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$LKFN LAKELAND FINANCIAL CORP Stock $lkfn

2016 Q4 Form 10-K Financial Statement

#000072199418000014 Filed on March 01, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$LKFN
LAKELAND FINANCIAL CORP Stock $lkfn