XML 42 R56.htm IDEA: XBRL DOCUMENT
v3.20.1

Fair Value of Financial Instruments and Fair Value Measurements - Schedule of Fair Value, Assets Measured On Nonrecurring Basis (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Dec. 31, 2019
One-to-Four Family Residential Real Estate Loans [Member] |  |
Impaired loans | $ 240 | $ 240
Total (losses)/gains on real estate owned | 1 | (15)
One-to-Four Family Residential Real Estate Loans [Member] | Level 1 [Member] |  |
Impaired loans |  |
One-to-Four Family Residential Real Estate Loans [Member] | Level 2 [Member] |  |
Impaired loans |  |
One-to-Four Family Residential Real Estate Loans [Member] | Level 3 [Member] |  |
Impaired loans | 240 | 240
Commercial Real Estate Loans [Member] |  |
Impaired loans | 144 | 100
Total (losses)/gains on real estate owned | 51 | (103)
Commercial Real Estate Loans [Member] | Level 1 [Member] |  |
Impaired loans |  |
Commercial Real Estate Loans [Member] | Level 2 [Member] |  |
Impaired loans |  |
Commercial Real Estate Loans [Member] | Level 3 [Member] |  |
Impaired loans | 144 | 100
Commercial Loans [Member] |  |
Impaired loans | 661 | 678
Total (losses)/gains on real estate owned | (31) | (177)
Commercial Loans [Member] | Level 1 [Member] |  |
Impaired loans |  |
Commercial Loans [Member] | Level 2 [Member] |  |
Impaired loans |  |
Commercial Loans [Member] | Level 3 [Member] |  |
Impaired loans | 661 | 678
Agriculture Loans [Member] |  |
Impaired loans | 140 | 405
Total (losses)/gains on real estate owned | 70 | (93)
Agriculture Loans [Member] | Level 1 [Member] |  |
Impaired loans |  |
Agriculture Loans [Member] | Level 2 [Member] |  |
Impaired loans |  |
Agriculture Loans [Member] | Level 3 [Member] |  |
Impaired loans | $ 140 | $ 405

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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as impaired loans disclosure. + References No definition available. + Details
Name: | LARK_ImpairedLoansFairValueDisclosure
Namespace Prefix: | LARK_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Total (losses)/gains on real estate owned. + References No definition available. + Details
Name: | LARK_TotalLossesgainsOnRealEstateOwned
Namespace Prefix: | LARK_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsNonrecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_FinancialInstrumentAxis=LARK_OneToFourFamilyResidentialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CommercialLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_FinancialInstrumentAxis=LARK_AgricultureLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |