XML 116 R75.htm IDEA: XBRL DOCUMENT
v3.20.1

Subordinated Debentures (Details Narrative) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2013 | Dec. 31, 2005 | Dec. 31, 2003
Subordinated Debentures 2003 [Member] |  |  |  |  |
Proceeds from issuance of debt |  |  |  |  | $ 8,200
Debt instruments, due date, year |  |  |  |  | 2034
Debt instrument, description of variable rate basis |  |  |  |  | Interest accrues at three month LIBOR plus 2.85%.
Subordinated borrowing, interest rate | 4.79% | 5.37% |  |  |
Subordinated Debentures 2003 [Member] | LIBOR [Member] |  |  |  |  |
Debt variable rate |  | 2.85% |  |  |
Subordinated Debentures 2005 [Member] |  |  |  |  |
Proceeds from issuance of debt |  |  |  | $ 8,200 |
Debt instruments, due date, year |  |  |  | 2036 |
Debt instrument, description of variable rate basis |  |  |  | Interest accrues at three month LIBOR plus 1.34%. |
Subordinated borrowing, interest rate | 3.23% | 4.13% |  |  |
Subordinated Debentures 2005 [Member] | LIBOR [Member] |  |  |  |  |
Debt variable rate |  | 1.34% |  |  |
Subordinated Debentures 2013 [Member] |  |  |  |  |
Proceeds from issuance of debt |  |  | $ 5,200 |  |
Debt instruments, due date, year |  |  | 2036 |  |
Debt instrument, description of variable rate basis |  |  | Interest accrues at three month LIBOR plus 1.62%. |  |
Subordinated borrowing, interest rate | 3.55% | 4.44% |  |  |
Subordinated Debentures 2013 [Member] | LIBOR [Member] |  |  |  |  |
Debt variable rate |  | 1.62% |  |  |

X
- Definition Year the original debt was scheduled to mature, in CCYY format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 + Details
Name: | us-gaap_DebtConversionOriginalDebtDueDateOfDebtYear
Namespace Prefix: | us-gaap_
Data Type: | us-types:gYearListItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentDescriptionOfVariableRateBasis
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Stated interest rate of the subordinated debt. + References No definition available. + Details
Name: | us-gaap_SubordinatedBorrowingInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SubordinatedBorrowingAxis=LARK_SubordinatedDebenturesTwoThousandThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubordinatedBorrowingAxis=LARK_SubordinatedDebenturesTwoThousandFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubordinatedBorrowingAxis=LARK_SubordinatedDebenturesTwoThousandThirteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |