XML 34 R23.htm IDEA: XBRL DOCUMENT
v3.23.3

Summary of Significant Accounting Policies (Policies) | 9 Months Ended
--- | ---
Sep. 30, 2023
Accounting Policies [Abstract] |
Investment Securities | Investment Securities. Investment securities are classified as held-to-maturity when management has the positive intent and ability to hold them to maturity. Securities are classified as available-for-sale when they might be sold before maturity. Held-to-maturity securities are carried at amortized cost while available-for-sale securities are carried at fair value, with unrealized holding gains and losses reported in other comprehensive income, net of tax. Interest income includes amortization of purchase premium or discount. Premiums and discounts on securities are amortized on the level-yield method without anticipating prepayments, except for mortgage backed securities where prepayments are anticipated. Realized gains and losses on sales of available-for-sale securities are recorded on a trade date basis and are calculated using the specific identification method.
Allowance for Credit Losses | Allowance for Credit Losses – Held-to-Maturity Investment Securities. Management measures expected credit losses on held-to-maturity investment securities on a collective basis by major security type. Accrued interest is excluded from the estimate of credit losses. The estimate of expected credit losses considers historical loss information adjusted for current conditions and reasonable and supportable forecasts.
Allowance for Credit Losses – Available-for-Sale Investment Securities | Allowance for Credit Losses – Available-for-Sale Investment Securities. For available-for-sale investment securities in an unrealized loss position, the Company first assesses whether it intends to sell, or is more likely than not will be required to sell the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value through income. For securities that do not meet the aforementioned criteria, the Company evaluates whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, the Company considers the extent to which fair value is less than amortized cost, the current interest rate environment, changes to rating of the security or security issuer, and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected was less than the amortized cost basis, a credit loss existed and an allowance for credit losses would be recorded for the credit loss, which is limited by the amount that the fair value is less than the amortized cost basis. Any impairment that has not been recorded through an allowance for credit losses is recognized in other comprehensive income. Changes in the allowance for credit losses are recorded as provision for or reversal of credit loss expense. Losses are charged against the allowance for credit losses when the Company determines the available-for-sale security is uncollectible or when either of the criteria regarding intent or requirement to sell is met. The Company does not estimate credit losses on available-for-sale security accrued interest receivable.
Loans | Loans. Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at amortized cost. The amortized cost is the principal balance outstanding net of previous charge-offs, and for purchased loans, net of unamortized purchase premiums and discounts. Interest income is accrued on the unpaid principal balance. Origination fees received on loans held in portfolio and the estimated direct costs of origination are deferred and amortized to interest income using the level yield method without anticipating prepayments. The accrual of interest on non-performing loans is discontinued at the time the loan is ninety days delinquent, unless the credit is well secured and in process of collection. Loans are placed on non-accrual or are charged off at an earlier date if collection of the principal or interest is considered doubtful. All interest accrued but not collected for loans that are placed on non-accrual or charged off is reversed against interest income. The interest on these loans is accounted for on the cash basis or cost recovery method, until qualifying for return to accrual. Loans are evaluated individually and are returned to accrual status when all principal and interest amounts contractually due are brought current and future payments are reasonably assured.
Allowance for Credit Losses - Loans | Allowance for Credit Losses - Loans. The allowance for credit losses is a valuation account that is deducted from the loans’ amortized cost basis to present the net amount expected to be collected on loans. The analysis is updated on a quarterly basis based on historical loss information adjusted for current conditions and reasonable and supportable forecasts. Additionally, the Company considers asset quality trends, composition and trends in the loan portfolio, underlying collateral values, industry trends and other pertinent factors, including regulatory recommendations. The level of the allowance for credit losses maintained by management is believed adequate to absorb all expected future losses expected in the loan portfolio at the balance sheet date. The allowance is adjusted through provision for credit losses and charge-offs, net of recoveries of amounts previously charged off. The allowance for credit losses is measured on a collective basis for pools of loans with similar risk characteristics. The Company has identified the following pools of financial assets with similar risk characteristics for measuring expected credit losses. One-to-Four Family Residential Real Estate. One-to-four family residential real estate loans consists primarily of loans secured by 1-4 family residential properties. Repayment is primarily dependent on the personal cash flow of the borrower. Construction and Land. Construction and land loans consist primarily of loans to facilitate the development of both residential and commercial real estate. Repayment is primarily dependent on the completion of the development and refinancing to longer term financing. Commercial Real Estate. Commercial real estate loans consist primarily of loans secured by office buildings, industrial buildings, warehouses, retail buildings and multi-family housing and are primarily owner-occupied. For such loans, repayment is largely dependent upon the operation of the borrower’s business. Commercial. Commercial loans include loans to business enterprises issued for commercial, industrial and/or other professional purposes. These loans are generally secured by equipment, inventory and accounts receivable of the borrower and repayment is primarily dependent on business cash flows. Agriculture. Agriculture loans include operating and real estate loans to agriculture enterprises. Generally, the borrower’s ability to repay is based on the cash flows from farming operations. Municipal. Municipal loans are generally related to equipment leasing or general fund loans. Repayment is primarily dependent on the tax revenue of the municipal entity. Consumer. Consumer loans include automobile, boat, home improvement and home equity loans. Repayment is primarily dependent on the personal cash flow of the borrower. The Company utilized a weighted average remaining maturity allowance methodology to calculate the allowance for credit losses. Historical loss rates are adjusted for current conditions and reasonable and supportable forecasts. Following the economic forecast period loss rates revert back to historical loss rates over a reasonable period of time. Additional adjustments for qualitative factors are included to quantify the risks within each of the loan categories that are not included in the historical loss rates or economic projections. The data for the allowance calculation may be obtained from internal or external sources. Loans that do not share similar risk characteristics with the collectively evaluated pools are evaluated on an individual basis and are excluded from the collectively evaluated loan pools. Such loans are evaluated for credit losses based on either discounted cash flows or the fair value of collateral. The Company estimates expected credit losses over the contractual term of obligations to extend credit, unless the obligation is unconditionally cancellable. The allowance for off-balance-sheet exposures is adjusted through the provision for credit losses. The estimates are determined based on the likelihood of funding during the contractual term and an estimate of credit losses subsequent to funding. Estimated credit losses on subsequently funded balances are based on the same assumptions used to estimated credit losses on loans. In March 2022, the FASB issued ASU 2022-02, Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures which eliminated the recognition and measurement guidance for troubled debt restructurings (“TDRs”) by creditors in ASC 310-40. The update also enhanced disclosure required for loan restructurings by creditors when a borrower is experiencing financial difficulty. Specifically, rather than applying the recognition and measurement guidance for TDRs, an entity will apply the loan refinancing and restructuring guidance to determine whether a modification or other form of restructuring results in a new loan or a continuation of an existing loan. Additionally, the amendments to this ASU require a public business entity to disclose current period gross charge-offs by year of origination for loans in the vintage disclosures. On January 1, 2023, the Company adopted ASU 2022-02, electing the prospective approach. The adoption did not have a material effect on the Company’s operating results or financial condition. The disclosures in this document have been updated to reflect the new guidance.
Loans Modifications | Loans Modifications. Loan modifications, including modifications to borrowers experiencing financial difficulty, are treated as a new loan if two conditions are met. The terms of the new loan are at least as favorable to the Company as the terms for comparable loans to other customers with similar collection risks and modifications to the terms of the original loan are more than minor.

X
- Definition Available forsale investment securities allowance for credit loss [Policy text block] + References No definition available. + Details
Name: | LARK_AvailableforSaleInvestmentSecuritiesAllowanceForCreditLossPolicyTextBlock
Namespace Prefix: | LARK_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Held to Maturity Investment Securities Allowance For Credit Loss [Policy Text Block] + References No definition available. + Details
Name: | LARK_HeldToMaturityInvestmentSecuritiesAllowanceForCreditLossPolicyTextBlock
Namespace Prefix: | LARK_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of accounting policy for financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481569/310-20-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481569/310-20-50-4 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481569/310-20-50-1 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-6 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-9 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (b,d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-15 + Details
Name: | us-gaap_FinanceLoansAndLeasesReceivablePolicy
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of accounting policy for investment in financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(3)(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483586/944-220-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-03(d)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479886/946-10-S99-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-03(f)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479886/946-10-S99-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-03(f)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479886/946-10-S99-3 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-03(f)(3)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479886/946-10-S99-3 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 12 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-12 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 19 -Subparagraph (2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-19 + Details
Name: | us-gaap_InvestmentPolicyTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of accounting policy for estimating the allowance for losses on loans and lease receivables. The disclosure may include (a) how the entity determines each element of the allowance, (b) which loans are evaluated individually and which loans are evaluated as a group, (c) how the entity determines both the allocated and unallocated portions of the allowance, (d) how the entity determines the loss factors applied to graded loans in order to develop a general allowance, and (e) what self-correcting mechanism the entity uses to reduce differences between estimated and actual losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-9 + Details
Name: | us-gaap_LoansAndLeasesReceivableAllowanceForLoanLossesPolicy
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of accounting policy for policy loans receivable, including the basis for determining the amount reported for loans made to policyholders against and secured by future policy benefits. May also disclose the range of interest rates charged to policyholders on such loans. + References No definition available. + Details
Name: | us-gaap_PolicyLoansReceivablePolicy
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration