XML 64 R53.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Schedule of Repurchase Agreements (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Assets Sold under Agreements to Repurchase [Line Items] |  |
Total | $ 6,349 | $ 7,403
US federal treasury obligations [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Total | 1,806 | 325
U.S. Federal Agency Obligations [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Total | 1,515 | 3,008
Agency mortgage backed [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Total | 3,028 | 4,070
Overnight And Continuous [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Total | 6,349 | 7,403
Overnight And Continuous [Member] | US federal treasury obligations [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Total | 1,806 | 325
Overnight And Continuous [Member] | U.S. Federal Agency Obligations [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Total | 1,515 | 3,008
Overnight And Continuous [Member] | Agency mortgage backed [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Total | 3,028 | 4,070
Upto 30 Days [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Total |  |
Upto 30 Days [Member] | US federal treasury obligations [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Total |  |
Upto 30 Days [Member] | U.S. Federal Agency Obligations [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Total |  |
Upto 30 Days [Member] | Agency mortgage backed [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Total |  |
30 - 90 Days [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Total |  |
30 - 90 Days [Member] | US federal treasury obligations [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Total |  |
30 - 90 Days [Member] | U.S. Federal Agency Obligations [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Total |  |
30 - 90 Days [Member] | Agency mortgage backed [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Total |  |
Greater Than 90 Days [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Total |  |
Greater Than 90 Days [Member] | US federal treasury obligations [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Total |  |
Greater Than 90 Days [Member] | U.S. Federal Agency Obligations [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Total |  |
Greater Than 90 Days [Member] | Agency mortgage backed [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Total |  |

X
- Definition Carrying amount of assets sold under agreements to repurchase when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under repurchase agreements exceeds 10 percent of total assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(m)(1)(i)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(m)(1)(ii)(A)(i)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
Name: | us-gaap_AssetsSoldUnderAgreementsToRepurchaseCarryingAmounts
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 No definition available. + Details
Name: | us-gaap_AssetsSoldUnderAgreementsToRepurchaseLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AssetsSoldUnderAgreementsToRepurchaseAxis=LARK_USFederalTreasuryObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AssetsSoldUnderAgreementsToRepurchaseAxis=LARK_USFederalAgencyObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AssetsSoldUnderAgreementsToRepurchaseAxis=LARK_AgencyMortgageBackedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis=LARK_OvernightAndContinuousMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis=LARK_UptoThirtyDaysMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis=LARK_ThirtyToNinetyDaysMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis=LARK_GreaterThanNinetyDaysMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |