XML 78 R68.htm IDEA: XBRL DOCUMENT v3.23.2

Schedule of Fair Value Measurements On Nonrecurring, Valuation Techniques (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Commercial Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Loans Fair Value Disclosure	$ 529	$ 101
Fair Value Measurements, Valuation Techniques	Sales comparison	Sales comparison
Fair Value Measurements, Unobservable inputs	Adjustment to comparable value	Adjustment to comparable value
Commercial Loan [Member] | Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements Range	0.00%	0.00%
Commercial Loan [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements Range	30.00%	25.00%
Agriculturel Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Loans Fair Value Disclosure	$ 324
Fair Value Measurements, Valuation Techniques	Sales comparison
Fair Value Measurements, Unobservable inputs	Adjustment to appraised value
Agriculturel Loan [Member] | Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements Range	0.00%
Agriculturel Loan [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements Range	50.00%
One to Four Family Residential Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Loans Fair Value Disclosure		$ 272
Fair Value Measurements, Valuation Techniques		Sales comparison
Fair Value Measurements, Unobservable inputs		Adjustment to appraised value
Fair Value Measurements Real estate owned Range		15.00%
Commercial Real Estate Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Loans Fair Value Disclosure		$ 234
Fair Value Measurements, Valuation Techniques		Sales comparison
Fair Value Measurements, Unobservable inputs		Adjustment to appraised value
Fair Value Measurements Real estate owned Range		15.00%

X

- Definition

Fair Value Measurements, Valuation Techniques.

+ References

No definition available.

+ Details

Name:	LARK_FairValueMeasurementValuationTechniques
Namespace Prefix:	LARK_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Fair Value Measurements Real estate owned Range.

+ References

No definition available.

+ Details

Name:	LARK_FairValueMeasurementsRealEstateOwnedRange
Namespace Prefix:	LARK_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The range of Level 3 fair value measurements for impaired loans measured at fair value on a non-recurring basis.

+ References

No definition available.

+ Details

Name:	LARK_FairValueMeasurementsSalesComparisonRange
Namespace Prefix:	LARK_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Fair Value Measurements, Unobservable inputs.

+ References

No definition available.

+ Details

Name:	LARK_FairValueMeasurementsUnobservableInputs
Namespace Prefix:	LARK_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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

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/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-3

+ Details

Name:	us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

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

X

- Details

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

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=LARK_AgriculturelLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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