XML 65 R54.htm IDEA: XBRL DOCUMENT v3.19.2

Fair Value of Financial Instruments and Fair Value Measurements - Schedule of Fair Value, Assets Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	$ 382,295	$ 388,345
Loans held for Sale	13,164	4,743
Assets: Derivative financial instruments	1,029	522
Liabilities: Derivative financial instruments	275	25
Municipal Obligations, Tax Exempt [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	155,237	159,112
Municipal Obligations, Taxable [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	53,765	53,035
Certificates of Deposit [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	5,978	7,790
Agency Mortgage-backed Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	158,407	156,076
Level 1 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	2,310	1,971
Assets: Derivative financial instruments
Liabilities: Derivative financial instruments
Level 2 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	379,985	386,374
Assets: Derivative financial instruments	1,029	522
Liabilities: Derivative financial instruments	275	25
Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Assets: Derivative financial instruments
Liabilities: Derivative financial instruments
Fair Value, Measurements, Recurring [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for Sale	13,164	4,743
Assets: Derivative financial instruments	1,029	522
Liabilities: Derivative financial instruments	(275)	(25)
Fair Value, Measurements, Recurring [Member] | Municipal Obligations, Tax Exempt [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	155,237	159,112
Fair Value, Measurements, Recurring [Member] | Municipal Obligations, Taxable [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	53,765	53,035
Fair Value, Measurements, Recurring [Member] | Agency Mortgage-backed Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	158,407
Fair Value, Measurements, Recurring [Member] | Certificates of Deposit [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	5,978	7,790
Fair Value, Measurements, Recurring [Member] | Agency Mortgage-backed Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale		156,076
Fair Value, Measurements, Recurring [Member] | U.S. Federal Agency Obligations [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	6,598	10,361
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for Sale
Assets: Derivative financial instruments
Liabilities: Derivative financial instruments
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Municipal Obligations, Tax Exempt [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Municipal Obligations, Taxable [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Agency Mortgage-backed Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Certificates of Deposit [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Agency Mortgage-backed Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | U.S. Federal Agency Obligations [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for Sale	13,164	4,743
Assets: Derivative financial instruments	1,029	522
Liabilities: Derivative financial instruments	(275)	(25)
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Municipal Obligations, Tax Exempt [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	155,237	159,112
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Municipal Obligations, Taxable [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	53,765	53,035
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Agency Mortgage-backed Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	158,407
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Certificates of Deposit [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	5,978	7,790
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Agency Mortgage-backed Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale		156,076
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | U.S. Federal Agency Obligations [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	6,598	10,361
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for Sale
Assets: Derivative financial instruments
Liabilities: Derivative financial instruments
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Municipal Obligations, Tax Exempt [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Municipal Obligations, Taxable [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Agency Mortgage-backed Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Certificates of Deposit [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Agency Mortgage-backed Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | U.S. Federal Agency Obligations [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | U.S. Treasury Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	2,310	1,971
Fair Value, Measurements, Recurring [Member] | U.S. Treasury Securities [Member] | Level 1 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	2,310	1,971
Fair Value, Measurements, Recurring [Member] | U.S. Treasury Securities [Member] | Level 2 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | U.S. Treasury Securities [Member] | Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale

X

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

No definition available.

+ Details

Name:	us-gaap_AvailableForSaleSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

+ Details

Name:	us-gaap_DerivativeAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313

+ Details

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

X

- Definition

Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

+ References

No definition available.

+ Details

Name:	us-gaap_LoansHeldForSaleFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_InvestmentTypeAxis=LARK_MunicipalObligationsTaxExemptMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=LARK_MunicipalObligationsTaxableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_CertificatesOfDepositMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=LARK_AgencyMortgageBackedSecuritiesMember
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_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_MortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_UnderlyingAssetClassAxis=LARK_USFederalAgencyObligationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CashAndCashEquivalentsAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: