XML 45 R34.htm IDEA: XBRL DOCUMENT
v3.23.3

Schedule of Purchase Accounting Discounts on Loans from an Adjustment to Amortized Cost (Details) $ in Thousands | Jan. 01, 2023 USD ($)
--- | ---
Financing Receivable, Past Due [Line Items] |
Held-to-maturity investment securities |
Total allowance for credit losses for loans | 8,791
Unfunded loan commitments | 170
Real Estate Portfolio Segment [Member] | One to Four Family Residential Real Estate Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Total allowance for credit losses for loans | 655
Real Estate Portfolio Segment [Member] | Construction And Land Loan [Member] |
Financing Receivable, Past Due [Line Items] |
Total allowance for credit losses for loans | 117
Real Estate Portfolio Segment [Member] | Commercial Real Estate Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Total allowance for credit losses for loans | 3,158
Real Estate Portfolio Segment [Member] | Commercial Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Total allowance for credit losses for loans | 2,753
Real Estate Portfolio Segment [Member] | Paycheck Protection Program Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Total allowance for credit losses for loans |
Real Estate Portfolio Segment [Member] | Agriculture Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Total allowance for credit losses for loans | 1,966
Real Estate Portfolio Segment [Member] | Municipal Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Total allowance for credit losses for loans | 5
Real Estate Portfolio Segment [Member] | Consumer Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Total allowance for credit losses for loans | 137
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] |
Financing Receivable, Past Due [Line Items] |
Held-to-maturity investment securities | 72
Total allowance for credit losses for loans | 10,314
Unfunded loan commitments | 170
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Real Estate Portfolio Segment [Member] | One to Four Family Residential Real Estate Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Total allowance for credit losses for loans | 1,677
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Real Estate Portfolio Segment [Member] | Construction And Land Loan [Member] |
Financing Receivable, Past Due [Line Items] |
Total allowance for credit losses for loans | 166
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Real Estate Portfolio Segment [Member] | Commercial Real Estate Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Total allowance for credit losses for loans | 4,221
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Real Estate Portfolio Segment [Member] | Commercial Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Total allowance for credit losses for loans | 2,898
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Real Estate Portfolio Segment [Member] | Paycheck Protection Program Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Total allowance for credit losses for loans |
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Real Estate Portfolio Segment [Member] | Agriculture Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Total allowance for credit losses for loans | 1,142
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Real Estate Portfolio Segment [Member] | Municipal Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Total allowance for credit losses for loans | 16
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Real Estate Portfolio Segment [Member] | Consumer Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Total allowance for credit losses for loans | 194
Cumulative Effect, Period of Adoption, Adjustment [Member] |
Financing Receivable, Past Due [Line Items] |
Held-to-maturity investment securities | 72
Total allowance for credit losses for loans | 1,523
Unfunded loan commitments |
Cumulative Effect, Period of Adoption, Adjustment [Member] | Real Estate Portfolio Segment [Member] | One to Four Family Residential Real Estate Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Total allowance for credit losses for loans | 1,022
Cumulative Effect, Period of Adoption, Adjustment [Member] | Real Estate Portfolio Segment [Member] | Construction And Land Loan [Member] |
Financing Receivable, Past Due [Line Items] |
Total allowance for credit losses for loans | 49
Cumulative Effect, Period of Adoption, Adjustment [Member] | Real Estate Portfolio Segment [Member] | Commercial Real Estate Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Total allowance for credit losses for loans | 1,063
Cumulative Effect, Period of Adoption, Adjustment [Member] | Real Estate Portfolio Segment [Member] | Commercial Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Total allowance for credit losses for loans | 145
Cumulative Effect, Period of Adoption, Adjustment [Member] | Real Estate Portfolio Segment [Member] | Paycheck Protection Program Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Total allowance for credit losses for loans |
Cumulative Effect, Period of Adoption, Adjustment [Member] | Real Estate Portfolio Segment [Member] | Agriculture Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Total allowance for credit losses for loans | (824)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Real Estate Portfolio Segment [Member] | Municipal Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Total allowance for credit losses for loans | 11
Cumulative Effect, Period of Adoption, Adjustment [Member] | Real Estate Portfolio Segment [Member] | Consumer Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Total allowance for credit losses for loans | $ 57

X
- Definition Unfunded loan commitments. + References No definition available. + Details
Name: | LARK_UnfundedLoanCommitments
Namespace Prefix: | LARK_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, excluding accrued interest, of allowance for credit loss on investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-1 + Details
Name: | us-gaap_DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-1 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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 Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-14 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 80 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-80 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=LARK_RealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=LARK_OneToFourFamilyResidentialRealEstateLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=LARK_ConstructionAndLandLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=LARK_CommercialRealEstateLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=LARK_CommercialLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=LARK_PaycheckProtectionProgramLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=LARK_AgricultureLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=LARK_MunicipalLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=LARK_ConsumerLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CumulativeEffectPeriodOfAdoptionAxis=srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CumulativeEffectPeriodOfAdoptionAxis=srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |