XML 117 R102.htm IDEA: XBRL DOCUMENT
v3.22.4

CAPITAL REQUIREMENTS AND RESTRICTIONS ON RETAINED EARNINGS - Summary Of Capital Adequacy Requirements (Details) $ in Thousands | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
--- | --- | ---
Consolidated |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Total Capital (to Risk Weighted Assets), Actual Amount | $ 821,008 | $ 744,421
Total Capital (to Risk Weighted Assets), Actual Ratio | 0.1507 | 0.1535
Tier I Capital (to Risk Weighted Assets), Actual Amount | $ 752,751 | $ 683,754
Tier I Capital (to Risk Weighted Assets), Actual Ratio | 0.1382 | 0.1410
Common Equity Tier 1 (CET1), Actual Amount | $ 752,751 | $ 683,754
Common Equity Tier 1 (CET1), Actual Ratio | 13.82% | 14.10%
Tier I Capital (to Average Assets), Actual Amount | $ 752,751 | $ 683,754
Tier I Capital (to Average Assets), Actual Ratio | 0.1150 | 0.1073
Total Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Amount | $ 435,786 | $ 388,020
Total Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Ratio | 0.0800 | 0.0800
Tier I Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Amount | $ 326,840 | $ 291,015
Tier I Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Ratio | 0.0600 | 0.0600
Common Equity Tier 1 (CET1), Minimum Required For Capital Adequacy Purposes Amount | $ 245,130 | $ 218,261
Common Equity Tier 1 (CET1), Minimum Required For Capital Adequacy Purposes Ratio | 4.50% | 4.50%
Tier I Capital (to Average Assets), Minimum Required For Capital Adequacy Purposes Amount | $ 261,859 | $ 254,898
Tier I Capital (to Average Assets), Minimum Required For Capital Adequacy Purposes Ratio | 0.0400 | 0.0400
Excess Capital, For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount | $ 571,969 | $ 509,276
Tier I Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount | 463,023 | 412,271
Common Equity Tier 1 (CET1), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount | 381,313 | 339,518
Tier I Capital (to Average Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount | 261,859 | 254,898
Bank |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Total Capital (to Risk Weighted Assets), Actual Amount | $ 801,044 | $ 726,091
Total Capital (to Risk Weighted Assets), Actual Ratio | 0.1474 | 0.1501
Tier I Capital (to Risk Weighted Assets), Actual Amount | $ 732,966 | $ 665,424
Tier I Capital (to Risk Weighted Assets), Actual Ratio | 0.1349 | 0.1375
Common Equity Tier 1 (CET1), Actual Amount | $ 732,966 | $ 665,424
Common Equity Tier 1 (CET1), Actual Ratio | 13.49% | 13.75%
Tier I Capital (to Average Assets), Actual Amount | $ 732,966 | $ 665,424
Tier I Capital (to Average Assets), Actual Ratio | 0.1122 | 0.1046
Total Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Amount | $ 434,758 | $ 387,118
Total Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Ratio | 0.0800 | 0.0800
Tier I Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Amount | $ 326,069 | $ 290,339
Tier I Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Ratio | 0.0600 | 0.0600
Common Equity Tier 1 (CET1), Minimum Required For Capital Adequacy Purposes Amount | $ 244,551 | $ 217,754
Common Equity Tier 1 (CET1), Minimum Required For Capital Adequacy Purposes Ratio | 4.50% | 4.50%
Tier I Capital (to Average Assets), Minimum Required For Capital Adequacy Purposes Amount | $ 261,222 | $ 254,425
Tier I Capital (to Average Assets), Minimum Required For Capital Adequacy Purposes Ratio | 0.0400 | 0.0400
Excess Capital, For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount | $ 570,620 | $ 508,093
Excess Capital to Risk Weighted Assets, For Capital Adequacy Purposes Plus Capital Conservation Buffer Ratio | 0.1050 | 0.1050
Tier I Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount | $ 461,930 | $ 411,313
Tier I Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Ratio | 0.0850 | 0.0850
Common Equity Tier 1 (CET1), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount | $ 380,413 | $ 338,729
Common Equity Tier 1 (CET1), For Capital Adequacy Purposes Plus Capital Conservation Buffer Ratio | 7.00% | 7.00%
Tier I Capital (to Average Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount | $ 261,222 | $ 254,425
Tier I Capital (to Average Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Ratio | 0.0400 | 0.0400
Total Capital (to Risk Weighted Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Amount | $ 543,448 | $ 483,898
Total Capital (to Risk Weighted Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio | 0.1000 | 0.1000
Tier I Capital (to Risk Weighted Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Amount | $ 434,758 | $ 387,118
Tier I Capital (to Risk Weighted Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio | 0.0800 | 0.0800
Common Equity Tier 1 (CET1), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Amount | $ 353,241 | $ 314,534
Common Equity Tier 1 (CET1), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio | 6.50% | 6.50%
Tier I Capital (to Average Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Amount | $ 326,527 | $ 318,030
Tier I Capital (to Average Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio | 0.0500 | 0.0500

X
- Definition Common Equity Tier 1 (CET1) Risk Based Capital as defined in the regulations. + References No definition available. + Details
Name: | lkfn_CetOneRiskBasedCapital
Namespace Prefix: | lkfn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum amount of Common Equity Tier 1 (CET1) Risk Based Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References No definition available. + Details
Name: | lkfn_CetOneRiskBasedCapitalRequiredForCapitalAdequacy
Namespace Prefix: | lkfn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum Common Equity Tier 1 (CET1) Capital Ratio (CET one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References No definition available. + Details
Name: | lkfn_CetOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
Namespace Prefix: | lkfn_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of Common Equity Tier 1 (CET1) Risk Based Capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action. + References No definition available. + Details
Name: | lkfn_CetOneRiskBasedCapitalRequiredToBeWellCapitalized
Namespace Prefix: | lkfn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The Common Equity Tier 1 (CET1) capital ratio (CET 1 capital divided by risk weighted assets) required to be categorized as "well capitalized" under the regulatory framework for prompt corrective action. + References No definition available. + Details
Name: | lkfn_CetOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
Namespace Prefix: | lkfn_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of actual Common Equity Tier 1 (CET1) Risk Based Capital (which consists of the types of financial capital considered the most reliable and liquid, primarily Shareholders' equity. + References No definition available. + Details
Name: | lkfn_Cetoneriskbasedcapitaltoriskweightedassets
Namespace Prefix: | lkfn_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of excess Common Equity Tier 1 (CET1) Risk Based Capital (which consists of the types of financial capital considered the most reliable and liquid, primarily Shareholders' equity. + References No definition available. + Details
Name: | lkfn_ExcessCetOneRiskBasedCapitalToRiskWeightedAssets
Namespace Prefix: | lkfn_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Excess Cet One Risk Based Capital. + References No definition available. + Details
Name: | lkfn_Excesscetoneriskbasedcapital
Namespace Prefix: | lkfn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of total capital as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_Capital
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of minimum total risk-based capital required for capital adequacy as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 + Details
Name: | us-gaap_CapitalRequiredForCapitalAdequacy
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Ratio of minimum total risk-based capital to risk-weighted assets required for capital adequacy as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of minimum total risk-based capital categorized as well capitalized as defined by regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_CapitalRequiredToBeWellCapitalized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Ratio of minimum total risk-based capital to risk-weighted assets categorized as well capitalized as defined by regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Ratio of total risk-based capital to risk-weighted assets as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_CapitalToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition Amount of total risk-based capital exceeding minimum required for capital adequacy as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_ExcessCapital
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Ratio of total risk-based capital to risk-weighted assets exceeding minimum required for capital adequacy as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_ExcessCapitalToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of Tier 1 leverage capital exceeding minimum required for capital adequacy as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_ExcessTierOneLeverageCapital
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Ratio of Tier 1 leverage capital to average assets exceeding minimum required for capital adequacy as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_ExcessTierOneLeverageCapitalToAverageAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of Tier 1 risk-based capital exceeding minimum required for capital adequacy as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_ExcessTierOneRiskBasedCapital
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Ratio of Tier 1 risk-based capital to risk-weighted assets exceeding minimum required for capital adequacy as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_ExcessTierOneRiskBasedCapitalToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of Tier 1 leverage capital as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneLeverageCapital
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of minimum Tier 1 leverage capital required for capital adequacy as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Ratio of minimum Tier 1 leverage capital to average assets required for capital adequacy as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of minimum Tier 1 leverage capital categorized as well capitalized as defined by regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Ratio of minimum Tier 1 leverage capital to average assets categorized as well capitalized as defined by regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Ratio of Tier 1 capital to average assets as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneLeverageCapitalToAverageAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of Tier 1 risk-based capital as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneRiskBasedCapital
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of minimum Tier 1 risk-based capital required for capital adequacy as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 + Details
Name: | us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Ratio of minimum Tier 1 risk-based capital to risk-weighted assets required for capital adequacy as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of minimum Tier 1 risk-based capital categorized as well capitalized as defined by regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Ratio of minimum Tier 1 risk-based capital to risk-weighted assets categorized as well capitalized as defined by regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Ratio of Tier 1 risk-based capital to risk-weighted assets as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | dei_LegalEntityAxis=lkfn_ConsolidatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=lkfn_BankMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |