XML 66 R56.htm IDEA: XBRL DOCUMENT v3.22.1

Schedule of Fair Value Measurements On Nonrecurring, Valuation Techniques (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Commercial Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans fair value disclosure	$ 1	$ 5
Fair value measurement valuation techniques	Sales comparison	Sales comparison
Fair value measurements, unobservable inputs	Adjustment to comparable value	Adjustment to comparable value
Fair value measurements range	0.00%	0.00%
Agriculture loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans fair value disclosure	$ 269
Fair value measurement valuation techniques	Sales comparison
Fair value measurements, unobservable inputs	Adjustment to appraised value
Agriculture loan [Member] | Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements range	20.00%
Agriculture loan [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements range	50.00%

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

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

No definition available.

+ 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:	us-gaap_FinancialInstrumentAxis=LARK_AgricultureLoanMember
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: