XML 53 R50.htm IDEA: XBRL DOCUMENT v3.19.3

Repurchase Agreements - Schedule of Repurchase Agreements (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Assets Sold under Agreements to Repurchase [Line Items]
Assets sold under agreements to repurchase, carrying amount	$ 16,279	$ 15,246
US Federal Treasury Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets sold under agreements to repurchase, carrying amount	649	416
U.S. Federal Agency Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets sold under agreements to repurchase, carrying amount	1,895	5,626
Agency Mortgage-backed Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets sold under agreements to repurchase, carrying amount	13,735	9,204
Overnight and Continuous [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets sold under agreements to repurchase, carrying amount	16,279	15,246
Overnight and Continuous [Member] | US Federal Treasury Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets sold under agreements to repurchase, carrying amount	649	416
Overnight and Continuous [Member] | U.S. Federal Agency Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets sold under agreements to repurchase, carrying amount	1,895	5,626
Overnight and Continuous [Member] | Agency Mortgage-backed Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets sold under agreements to repurchase, carrying amount	13,735	9,204
Up to 30 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets sold under agreements to repurchase, carrying amount
Up to 30 Days [Member] | US Federal Treasury Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets sold under agreements to repurchase, carrying amount
Up to 30 Days [Member] | U.S. Federal Agency Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets sold under agreements to repurchase, carrying amount
Up to 30 Days [Member] | Agency Mortgage-backed Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets sold under agreements to repurchase, carrying amount
30 - 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets sold under agreements to repurchase, carrying amount
30 - 90 Days [Member] | US Federal Treasury Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets sold under agreements to repurchase, carrying amount
30 - 90 Days [Member] | U.S. Federal Agency Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets sold under agreements to repurchase, carrying amount
30 - 90 Days [Member] | Agency Mortgage-backed Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets sold under agreements to repurchase, carrying amount
Greater Than 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets sold under agreements to repurchase, carrying amount
Greater Than 90 Days [Member] | US Federal Treasury Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets sold under agreements to repurchase, carrying amount
Greater Than 90 Days [Member] | U.S. Federal Agency Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets sold under agreements to repurchase, carrying amount
Greater Than 90 Days [Member] | Agency Mortgage-backed Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Assets sold under agreements to repurchase, carrying amount

X

- Definition

Carrying amount of assets sold under agreements to repurchase when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under repurchase agreements exceeds 10 percent of total assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(m)(1)(i)(A)(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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

X

- Details

Name:	us-gaap_AssetsSoldUnderAgreementsToRepurchaseAxis=LARK_USFederalTreasuryObligationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_AssetsSoldUnderAgreementsToRepurchaseAxis=LARK_AgencyMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis=LARK_OvernightAndContinuousMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis=LARK_UptoThirtyDaysMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis=LARK_ThirtyToNinetyDaysMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis=LARK_GreaterThanNinetyDaysMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: