XML 54 R43.htm IDEA: XBRL DOCUMENT
v3.25.1

Schedule of Troubled Debt Restructurings on Financings Receivables and Year of Origination (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Short-Term Debt [Line Items] |  |
Nonclassified | $ 1,047,042 | $ 1,026,274
Classified | 27,882 | 26,079
Total | 1,074,924 | 1,052,353
Gross charge-offs | 108 | 659
One To Four Family Residential Real Estate [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 355,576 | 352,175
Classified | 56 | 34
Total | 355,632 | 352,209
Gross charge-offs |  |
Construction And Land Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 28,645 | 25,328
Classified |  |
Total | 28,645 | 25,328
Gross charge-offs |  |
Commercial Real Estate [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 356,732 | 342,578
Classified | 2,847 | 2,581
Total | 359,579 | 345,159
Gross charge-offs |  |
Commercial Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 169,762 | 170,178
Classified | 21,119 | 22,147
Total | 190,881 | 192,325
Gross charge-offs | 19 | 186
Agriculture Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 97,948 | 99,245
Classified | 3,860 | 1,317
Total | 101,808 | 100,562
Gross charge-offs |  | 64
Municipal Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 7,082 | 7,091
Classified |  |
Total | 7,082 | 7,091
Gross charge-offs |  |
Consumer Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 31,297 | 29,679
Classified |  |
Total | 31,297 | 29,679
Gross charge-offs |  | 409
Two Thousand Twenty Five [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 57,944 |
Classified | 461 |
Total | 58,405 |
Gross charge-offs | 89 |
Two Thousand Twenty Five [Member] | One To Four Family Residential Real Estate [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 14,788 |
Classified |  |
Total | 14,788 |
Gross charge-offs |  |
Two Thousand Twenty Five [Member] | Construction And Land Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 3,660 |
Classified |  |
Total | 3,660 |
Gross charge-offs |  |
Two Thousand Twenty Five [Member] | Commercial Real Estate [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 21,185 |
Classified |  |
Total | 21,185 |
Gross charge-offs |  |
Two Thousand Twenty Five [Member] | Commercial Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 10,469 |
Classified | 461 |
Total | 10,930 |
Gross charge-offs |  |
Two Thousand Twenty Five [Member] | Agriculture Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 4,505 |
Classified |  |
Total | 4,505 |
Gross charge-offs |  |
Two Thousand Twenty Five [Member] | Municipal Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified |  |
Classified |  |
Total |  |
Gross charge-offs |  |
Two Thousand Twenty Five [Member] | Consumer Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 3,337 |
Classified |  |
Total | 3,337 |
2024 [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 203,739 | 213,776
Classified | 13,583 | 11,753
Total | 217,322 | 225,529
Gross charge-offs | 8 | 376
2024 [Member] | One To Four Family Residential Real Estate [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 84,391 | 86,701
Classified |  |
Total | 84,391 | 86,701
Gross charge-offs |  |
2024 [Member] | Construction And Land Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 5,638 | 6,481
Classified |  |
Total | 5,638 | 6,481
Gross charge-offs |  |
2024 [Member] | Commercial Real Estate [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 58,840 | 59,717
Classified | 817 | 360
Total | 59,657 | 60,077
Gross charge-offs |  |
2024 [Member] | Commercial Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 34,142 | 31,083
Classified | 11,030 | 11,364
Total | 45,172 | 42,447
Gross charge-offs | 8 |
2024 [Member] | Agriculture Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 18,762 | 21,379
Classified | 1,736 | 29
Total | 20,498 | 21,408
Gross charge-offs |  |
2024 [Member] | Municipal Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified |  | 5,565
Classified |  |
Total |  | 5,565
Gross charge-offs |  |
2024 [Member] | Consumer Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 1,966 | 2,850
Classified |  |
Total | 1,966 | 2,850
Gross charge-offs |  | 376
2023 [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 175,842 | 177,339
Classified | 1,727 | 2,029
Total | 177,569 | 179,368
Gross charge-offs |  | 7
2023 [Member] | One To Four Family Residential Real Estate [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 82,891 | 84,467
Classified |  |
Total | 82,891 | 84,467
Gross charge-offs |  |
2023 [Member] | Construction And Land Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 11,907 | 11,202
Classified |  |
Total | 11,907 | 11,202
Gross charge-offs |  |
2023 [Member] | Commercial Real Estate [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 48,944 | 47,624
Classified |  |
Total | 48,944 | 47,624
Gross charge-offs |  |
2023 [Member] | Commercial Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 20,044 | 27,158
Classified | 1,666 | 1,851
Total | 21,710 | 29,009
Gross charge-offs |  |
2023 [Member] | Agriculture Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 3,452 | 3,659
Classified | 61 | 178
Total | 3,513 | 3,837
Gross charge-offs |  |
2023 [Member] | Municipal Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 5,552 |
Classified |  |
Total | 5,552 |
Gross charge-offs |  |
2023 [Member] | Consumer Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 3,052 | 3,229
Classified |  |
Total | 3,052 | 3,229
Gross charge-offs |  | 7
2022 [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 168,223 | 179,021
Classified | 2,131 | 2,154
Total | 170,354 | 181,175
Gross charge-offs |  | 17
2022 [Member] | One To Four Family Residential Real Estate [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 73,560 | 75,517
Classified |  |
Total | 73,560 | 75,517
Gross charge-offs |  |
2022 [Member] | Construction And Land Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 1,804 | 1,937
Classified |  |
Total | 1,804 | 1,937
Gross charge-offs |  |
2022 [Member] | Commercial Real Estate [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 64,410 | 68,854
Classified |  |
Total | 64,410 | 68,854
Gross charge-offs |  |
2022 [Member] | Commercial Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 19,767 | 23,574
Classified | 1,875 | 1,897
Total | 21,642 | 25,471
Gross charge-offs |  | 16
2022 [Member] | Agriculture Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 8,027 | 8,404
Classified | 256 | 257
Total | 8,283 | 8,661
Gross charge-offs |  |
2022 [Member] | Municipal Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 81 | 90
Classified |  |
Total | 81 | 90
Gross charge-offs |  |
2022 [Member] | Consumer Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 574 | 645
Classified |  |
Total | 574 | 645
Gross charge-offs |  | 1
2021 [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 104,760 | 107,477
Classified | 926 | 934
Total | 105,686 | 108,411
Gross charge-offs | 11 | 114
2021 [Member] | One To Four Family Residential Real Estate [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 36,091 | 37,411
Classified |  |
Total | 36,091 | 37,411
Gross charge-offs |  |
2021 [Member] | Construction And Land Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 1,672 | 1,697
Classified |  |
Total | 1,672 | 1,697
Gross charge-offs |  |
2021 [Member] | Commercial Real Estate [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 53,222 | 53,868
Classified | 475 | 476
Total | 53,697 | 54,344
Gross charge-offs |  |
2021 [Member] | Commercial Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 9,235 | 9,813
Classified | 34 | 39
Total | 9,269 | 9,852
Gross charge-offs | 11 | 114
2021 [Member] | Agriculture Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 3,552 | 3,616
Classified | 417 | 419
Total | 3,969 | 4,035
Gross charge-offs |  |
2021 [Member] | Municipal Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified |  |
Classified |  |
Total |  |
Gross charge-offs |  |
2021 [Member] | Consumer Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 988 | 1,072
Classified |  |
Total | 988 | 1,072
Gross charge-offs |  |
Prior [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 199,800 | 124,824
Classified | 5,175 | 1,714
Total | 204,975 | 126,538
Gross charge-offs |  | 88
Prior [Member] | One To Four Family Residential Real Estate [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 58,909 | 35,112
Classified | 56 | 34
Total | 58,965 | 35,146
Gross charge-offs |  |
Prior [Member] | Construction And Land Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 3,864 | 1,340
Classified |  |
Total | 3,864 | 1,340
Gross charge-offs |  |
Prior [Member] | Commercial Real Estate [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 106,907 | 67,351
Classified | 1,555 | 1,594
Total | 108,462 | 68,945
Gross charge-offs |  |
Prior [Member] | Commercial Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 9,157 | 2,203
Classified | 3,484 | 13
Total | 12,641 | 2,216
Gross charge-offs |  |
Prior [Member] | Agriculture Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 16,343 | 14,215
Classified | 80 | 73
Total | 16,423 | 14,288
Gross charge-offs |  | 64
Prior [Member] | Municipal Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 1,449 | 1,436
Classified |  |
Total | 1,449 | 1,436
Gross charge-offs |  |
Prior [Member] | Consumer Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 3,171 | 3,167
Classified |  |
Total | 3,171 | 3,167
Gross charge-offs |  | 24
Revolving Loans Amortized Cost [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 136,118 | 139,507
Classified | 2,914 | 2,321
Total | 139,032 | 141,828
Gross charge-offs |  |
Revolving Loans Amortized Cost [Member] | One To Four Family Residential Real Estate [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 4,831 | 5,552
Classified |  |
Total | 4,831 | 5,552
Gross charge-offs |  |
Revolving Loans Amortized Cost [Member] | Construction And Land Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 100 | 102
Classified |  |
Total | 100 | 102
Gross charge-offs |  |
Revolving Loans Amortized Cost [Member] | Commercial Real Estate [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 3,141 | 3,217
Classified |  |
Total | 3,141 | 3,217
Gross charge-offs |  |
Revolving Loans Amortized Cost [Member] | Commercial Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 66,832 | 68,282
Classified | 1,604 | 1,969
Total | 68,436 | 70,251
Gross charge-offs |  |
Revolving Loans Amortized Cost [Member] | Agriculture Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 43,098 | 44,458
Classified | 1,310 | 352
Total | 44,408 | 44,810
Gross charge-offs |  |
Revolving Loans Amortized Cost [Member] | Municipal Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified |  |
Classified |  |
Total |  |
Gross charge-offs |  |
Revolving Loans Amortized Cost [Member] | Consumer Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 18,116 | 17,896
Classified |  |
Total | 18,116 | 17,896
Gross charge-offs |  |
Revolving Loans Converted To Term [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 616 | 697
Classified | 965 | 1,377
Total | 1,581 | 2,074
Gross charge-offs |  | 1
Revolving Loans Converted To Term [Member] | One To Four Family Residential Real Estate [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 115 | 122
Classified |  |
Total | 115 | 122
Gross charge-offs |  |
Revolving Loans Converted To Term [Member] | Construction And Land Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified |  |
Classified |  |
Total |  |
Gross charge-offs |  |
Revolving Loans Converted To Term [Member] | Commercial Real Estate [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 83 | 85
Classified |  |
Total | 83 | 85
Gross charge-offs |  |
Revolving Loans Converted To Term [Member] | Commercial Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 116 | 135
Classified | 965 | 1,377
Total | 1,081 | 1,512
Gross charge-offs |  |
Revolving Loans Converted To Term [Member] | Agriculture Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 209 | 217
Classified |  |
Total | 209 | 217
Gross charge-offs |  |
Revolving Loans Converted To Term [Member] | Municipal Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified |  |
Classified |  |
Total |  |
Gross charge-offs |  |
Revolving Loans Converted To Term [Member] | Consumer Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified | 93 | 138
Classified |  |
Total | $ 93 | 138
Gross charge-offs |  | 1
Two Thousand And Twenty [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified |  | 83,633
Classified |  | 3,797
Total |  | 87,430
Gross charge-offs |  | 56
Two Thousand And Twenty [Member] | One To Four Family Residential Real Estate [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified |  | 27,293
Classified |  |
Total |  | 27,293
Gross charge-offs |  |
Two Thousand And Twenty [Member] | Construction And Land Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified |  | 2,569
Classified |  |
Total |  | 2,569
Gross charge-offs |  |
Two Thousand And Twenty [Member] | Commercial Real Estate [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified |  | 41,862
Classified |  | 151
Total |  | 42,013
Gross charge-offs |  |
Two Thousand And Twenty [Member] | Commercial Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified |  | 7,930
Classified |  | 3,637
Total |  | 11,567
Gross charge-offs |  | 56
Two Thousand And Twenty [Member] | Agriculture Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified |  | 3,297
Classified |  | 9
Total |  | 3,306
Gross charge-offs |  |
Two Thousand And Twenty [Member] | Municipal Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified |  |
Classified |  |
Total |  |
Gross charge-offs |  |
Two Thousand And Twenty [Member] | Consumer Loans [Member] |  |
Short-Term Debt [Line Items] |  |
Nonclassified |  | 682
Classified |  |
Total |  | 682
Gross charge-offs |  |

X
- Definition Financing receivable originated in current fiscal year charge off. + References No definition available. + Details
Name: | LARK_FinancingReceivableOriginatedInCurrentFiscalYearChargeoff
Namespace Prefix: | LARK_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing receivable originated in current fiscal year classified. + References No definition available. + Details
Name: | LARK_FinancingReceivableOriginatedInCurrentFiscalYearClassified
Namespace Prefix: | LARK_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing receivable originated in current fiscal year non classified. + References No definition available. + Details
Name: | LARK_FinancingReceivableOriginatedInCurrentFiscalYearNonclassified
Namespace Prefix: | LARK_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing receivable originated in current fiscal year totals. + References No definition available. + Details
Name: | LARK_FinancingReceivableOriginatedInCurrentFiscalYearTotals
Namespace Prefix: | LARK_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_ShortTermDebtLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=LARK_OneToFourFamilyResidentialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=LARK_ConstructionAndLandLoansMember
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=LARK_CommercialLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=LARK_AgricultureLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=LARK_MunicipalLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=LARK_ConsumerLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=LARK_TwoThousandTwentyFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=LARK_TwoThousandTwentyFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=LARK_TwoThousandTwentyThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=LARK_TwoThousandTwentyTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=LARK_TwoThousandTwentyOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=LARK_PriorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=LARK_RevolvingLoansAmortizedCostMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=LARK_RevolvingLoansConvertedToTermMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=LARK_TwoThousandAndTwentyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |