XML 27 R57.htm IDEA: XBRL DOCUMENT v3.19.3

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	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
One-to-Four Family Residential Real Estate Loans [Member]
Impaired loans	$ 54	$ 110
Real estate owned	14
Total (losses)/gains on impaired loans fair value disclosure	(222)	(29)
Total (losses)/gains on real estate owned	(6)
One-to-Four Family Residential Real Estate Loans [Member] | Level 1 [Member]
Impaired loans
Real estate owned
One-to-Four Family Residential Real Estate Loans [Member] | Level 2 [Member]
Impaired loans
Real estate owned
One-to-Four Family Residential Real Estate Loans [Member] | Level 3 [Member]
Impaired loans	54	110
Real estate owned	14
Construction and Land [Member]
Impaired loans	185	322
Total (losses)/gains on impaired loans fair value disclosure	(6)	(103)
Construction and Land [Member] | Level 1 [Member]
Impaired loans
Construction and Land [Member] | Level 2 [Member]
Impaired loans
Construction and Land [Member] | Level 3 [Member]
Impaired loans	185	322
Commercial Real Estate[Member]
Impaired loans	91	1,725
Total (losses)/gains on impaired loans fair value disclosure	(112)	377
Commercial Real Estate[Member] | Level 1 [Member]
Impaired loans
Commercial Real Estate[Member] | Level 2 [Member]
Impaired loans
Commercial Real Estate[Member] | Level 3 [Member]
Impaired loans	91	1,725
Commercial Loans [Member]
Impaired loans	691	55
Total (losses)/gains on impaired loans fair value disclosure	(164)	(51)
Commercial Loans [Member] | Level 1 [Member]
Impaired loans
Commercial Loans [Member] | Level 2 [Member]
Impaired loans
Commercial Loans [Member] | Level 3 [Member]
Impaired loans	$ 691	55
Agriculture Loans [Member]
Impaired loans		175
Total (losses)/gains on impaired loans fair value disclosure		11
Agriculture Loans [Member] | Level 1 [Member]
Impaired loans
Agriculture Loans [Member] | Level 2 [Member]
Impaired loans
Agriculture Loans [Member] | Level 3 [Member]
Impaired loans		$ 175

X

- Definition

Gain Loss On Impaired Loans Fair Value Disclosure

+ References

No definition available.

+ Details

Name:	LARK_GainLossOnImpairedLoansFairValueDisclosure
Namespace Prefix:	LARK_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

Real estate owned fair value disclosure.

+ References

No definition available.

+ Details

Name:	LARK_RealEstateOwnedFairValueDisclosure
Namespace Prefix:	LARK_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- 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

X

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsNonrecurringMember
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_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CommercialRealEstateMember
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: