XML 64 R53.htm IDEA: XBRL DOCUMENT v3.7.0.1

Fair Value of Financial Instruments and Fair Value Measurements - Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Commercial Real Estate [Member]
Impaired Loans Fair Value Disclosure		$ 219
Fair Value Measurements, Valuation Techniques		Sales comparison
Fair Value Measurements, Changes in Valuation Techniques		Adjustment to appraised value
Minimum [Member] | Commercial Real Estate [Member]
Fair Value Measurements Sales Comparison Range		2.00%
Maximum [Member] | Commercial Real Estate [Member]
Fair Value Measurements Sales Comparison Range		15.00%
Commercial Loan [Member]
Impaired Loans Fair Value Disclosure	$ 177
Fair Value Measurements, Valuation Techniques	Sales comparison
Fair Value Measurements, Changes in Valuation Techniques	Adjustment to comparable sales
Commercial Loan [Member] | Minimum [Member]
Fair Value Measurements Sales Comparison Range	0.00%
Commercial Loan [Member] | Maximum [Member]
Fair Value Measurements Sales Comparison Range	50.00%
Agriculture Loans [Member]
Impaired Loans Fair Value Disclosure	$ 670	$ 645
Fair Value Measurements, Valuation Techniques	Sales comparison	Sales comparison
Fair Value Measurements, Changes in Valuation Techniques	Adjustment to appraised value	Adjustment to comparable sales
Agriculture Loans [Member] | Minimum [Member]
Fair Value Measurements Sales Comparison Range	10.00%	8.00%
Agriculture Loans [Member] | Maximum [Member]
Fair Value Measurements Sales Comparison Range	50.00%	80.00%
One-to-four family residential real estate [Member]
Impaired Loans Fair Value Disclosure		$ 142
Real Estate Owned Fair Value Disclosure	$ 302
Fair Value Measurements, Valuation Techniques	Sales comparison	Sales comparison
Fair Value Measurements, Changes in Valuation Techniques	Adjustment to appraised value	Adjustment to appraised value
Fair Value Measurements Sales Comparison Range	10.00%	10.00%
Consumer Loan [Member]
Impaired Loans Fair Value Disclosure		$ 222
Fair Value Measurements, Valuation Techniques		Sales comparison
Fair Value Measurements, Changes in Valuation Techniques		Adjustment to comparable sales
Consumer Loan [Member] | Minimum [Member]
Fair Value Measurements Sales Comparison Range		7.00%
Consumer Loan [Member] | Maximum [Member]
Fair Value Measurements Sales Comparison Range		80.00%

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:	num:percentItemType
Balance Type:	na
Period Type:	instant

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

Represents the amount of real estate owned fair value disclosure.

+ References

No definition available.

+ Details

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

X

- Definition

Description of the changes in valuation technique(s) and related inputs used to measure fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

+ Details

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

X

- Definition

Description of the inputs and valuation technique(s) used to measure fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueMeasurementsValuationTechniques
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_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis=LARK_AgricultureLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis=us-gaap_ConsumerLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: