XML 47 R36.htm IDEA: XBRL DOCUMENT v3.21.2

SECURITIES - Quantitative Disclosure of Available For Sale of Securities (Details) - position	Jun. 30, 2021	Dec. 31, 2020
Number of securities with unrealized losses [Abstract]
Number of available-for-sale securities in unrealized loss positions, less than 12 months	70	7
Number of available-for-sale securities in unrealized loss positions, 12 months or more	0	1
Number of available-for-sale securities in unrealized loss positions, total	70	8
U.S. government sponsored agencies
Number of securities with unrealized losses [Abstract]
Number of available-for-sale securities in unrealized loss positions, less than 12 months	6	3
Number of available-for-sale securities in unrealized loss positions, 12 months or more	0	0
Number of available-for-sale securities in unrealized loss positions, total	6	3
Mortgage-backed securities: residential
Number of securities with unrealized losses [Abstract]
Number of available-for-sale securities in unrealized loss positions, less than 12 months	20	2
Number of available-for-sale securities in unrealized loss positions, 12 months or more	0	1
Number of available-for-sale securities in unrealized loss positions, total	20	3
Mortgage-backed securities: commercial
Number of securities with unrealized losses [Abstract]
Number of available-for-sale securities in unrealized loss positions, less than 12 months	0	0
Number of available-for-sale securities in unrealized loss positions, 12 months or more	0	0
Number of available-for-sale securities in unrealized loss positions, total	0	0
State and municipal securities
Number of securities with unrealized losses [Abstract]
Number of available-for-sale securities in unrealized loss positions, less than 12 months	44	2
Number of available-for-sale securities in unrealized loss positions, 12 months or more	0	0
Number of available-for-sale securities in unrealized loss positions, total	44	2

X

- Definition

Disclosure regarding factors used to determine that the impairment of securities not categorized as either held-to-maturity securities or trading securities (hence equal to available for sale securities) where cost exceeds fair value is not an other than temporary impairment (OTTI). This item contains disclosure of the number of investment positions in the available-for-sale investments determined to be temporarily impaired for 12 months or more.

+ References

No definition available.

+ Details

Name:	lkfn_NumberOfAvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions12MonthsOrMore
Namespace Prefix:	lkfn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Disclosure regarding factors used to determine that the impairment of securities not categorized as either held-to-maturity securities or trading securities (hence equal to available for sale securities) where cost exceeds fair value is not an other than temporary impairment (OTTI). This item contains disclosure of the number of investment positions in the available-for-sale investments determined to be temporarily impaired for less than 12 months.

+ References

No definition available.

+ Details

Name:	lkfn_NumberOfAvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsLessThan12Months
Namespace Prefix:	lkfn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	lkfn_NumberOfSecuritiesWithUnrealizedLossesAbstract
Namespace Prefix:	lkfn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27290-111563

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: