XML 52 R36.htm IDEA: XBRL DOCUMENT
v3.20.4

SECURITIES (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
SECURITIES |
Summary of Available-For-Sale Securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair
(dollars in thousands) |  | Cost |  | Gain |  | Losses |  | Value
2020 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. government sponsored agencies |  | $ | 36,492 |  | $ | 56 |  | $ | (61) |  | $ | 36,487
Mortgage-backed securities: residential | ​ | ​ | 270,231 | ​ | ​ | 9,289 | ​ | ​ | (17) | ​ | ​ | 279,503
Mortgage-backed securities: commercial | ​ |  | 35,877 | ​ | ​ | 1,004 | ​ | ​ | — | ​ | ​ | 36,881
State and municipal securities | ​ |  | 355,306 | ​ | ​ | 26,696 | ​ | ​ | (28) | ​ | ​ | 381,974
Total | ​ | $ | 697,906 | ​ | $ | 37,045 | ​ | $ | (106) | ​ | $ | 734,845
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
2019 | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Mortgage-backed securities: residential | ​ | $ | 283,817 | ​ | $ | 4,751 | ​ | $ | (387) | ​ | $ | 288,181
Mortgage-backed securities: commercial | ​ |  | 36,712 | ​ | ​ | 262 | ​ | ​ | (2) | ​ | ​ | 36,972
State and municipal securities | ​ |  | 270,480 | ​ | ​ | 12,828 | ​ | ​ | (228) | ​ | ​ | 283,080
Total | ​ | $ | 591,009 | ​ | $ | 17,841 | ​ | $ | (617) | ​ | $ | 608,233
Schedule of Available-For-Sale Securities By Maturity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Amortized | ​ | Fair
(dollars in thousands) |  | Cost |  | Value
Due in one year or less | ​ | $ | 2,164 | ​ | $ | 2,175
Due after one year through five years | ​ |  | 11,543 | ​ | ​ | 11,850
Due after five years through ten years | ​ |  | 35,829 | ​ | ​ | 37,960
Due after ten years | ​ |  | 342,262 | ​ | ​ | 366,476
​ | ​ |  | 391,798 | ​ | ​ | 418,461
Mortgage-backed securities | ​ |  | 306,108 | ​ | ​ | 316,384
Total debt securities | ​ | $ | 697,906 | ​ | $ | 734,845
Schedule of Sales of Securities Available For Sale | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(dollars in thousands) |  | 2020 |  | 2019 |  | 2018
Sales of securities available-for-sale | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Proceeds | ​ | $ | 8,018 | ​ | $ | 57,114 | ​ | $ | 15,302
Gross gains | ​ |  | 433 | ​ |  | 279 | ​ |  | 21
Gross losses | ​ |  | — | ​ |  | (137) | ​ |  | (71)
Number of securities | ​ |  | 17 | ​ |  | 46 | ​ |  | 29
Schedule of Available-For-Sale Securities Continuous Unrealized Loss Position | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less than 12 months | ​ | 12 months or more | ​ | Total
​ | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized
(dollars in thousands) |  | Value |  | Losses |  | Value |  | Losses |  | Value |  | Losses
2020 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
U.S. government sponsored agencies | ​ | $ | 19,800 | ​ | $ | 61 | ​ | $ | — | ​ | $ | — | ​ | $ | 19,800 | ​ | $ | 61
Mortgage-backed securities: residential | ​ | ​ | 3 | ​ | ​ | — | ​ | ​ | 3,112 | ​ | ​ | 17 | ​ | ​ | 3,115 | ​ | ​ | 17
Mortgage-backed securities: commercial | ​ |  | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
State and municipal securities | ​ |  | 6,921 | ​ | ​ | 28 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 6,921 | ​ | ​ | 28
Total temporarily impaired | ​ | $ | 26,724 | ​ | $ | 89 | ​ | $ | 3,112 | ​ | $ | 17 | ​ | $ | 29,836 | ​ | $ | 106
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
2019 | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Mortgage-backed securities: residential | ​ | $ | 23,436 | ​ | $ | 112 | ​ | $ | 14,174 | ​ | $ | 275 | ​ | $ | 37,610 | ​ | $ | 387
Mortgage-backed securities: commercial | ​ |  | 4,591 | ​ | ​ | 2 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 4,591 | ​ | ​ | 2
State and municipal securities | ​ |  | 14,188 | ​ | ​ | 228 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 14,188 | ​ | ​ | 228
Total temporarily impaired | ​ | $ | 42,215 | ​ | $ | 342 | ​ | $ | 14,174 | ​ | $ | 275 | ​ | $ | 56,389 | ​ | $ | 617
Schedule of Quantitative Disclosure of Available-For-Sale Securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less than | ​ | 12 months | ​ | ​
​ |  | 12 months |  | or more |  | Total
2020 |  |  |  |  | ​ | ​
U.S. government sponsored agencies | ​ | 3 | ​ | — | ​ | 3
Mortgage-backed securities: residential |  | 2 | ​ | 1 | ​ | 3
Mortgage-backed securities: commercial |  | — | ​ | — | ​ | —
State and municipal securities |  | 2 | ​ | — | ​ | 2
Total temporarily impaired |  | 7 | ​ | 1 | ​ | 8
​ | ​ | ​ | ​ | ​ | ​ | ​
2019 |  |  |  |  | ​ | ​
Mortgage-backed securities: residential |  | 7 | ​ | 6 | ​ | 13
Mortgage-backed securities: commercial |  | 1 | ​ | — | ​ | 1
State and municipal securities |  | 11 | ​ | — | ​ | 11
Total temporarily impaired |  | 19 | ​ | 6 | ​ | 25

X
- Definition Tabular disclosure of the number of available for sale securities in unrealized loss positions. + References No definition available. + Details
Name: | lkfn_QuantitativeDisclosureOfAvailableForSaleSecuritiesTableTextBlock
Namespace Prefix: | lkfn_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the sales of securities available for sale. + References No definition available. + Details
Name: | lkfn_ScheduleOfSalesOfSecuritiesAvailableForSaleTableTextBlock
Namespace Prefix: | lkfn_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of fair value of investments in debt and equity securities in an unrealized loss position categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
Name: | us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration