XML 18 R5.htm IDEA: XBRL DOCUMENT
v3.22.1

Consolidated Statements of Earnings (Parenthetical) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Consolidated Statements Of Earnings |  |  |
Stock dividend percentage | 5.00% | 5.00% | 5.00%

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

X
- Definition Stock dividend percentage. + References No definition available. + Details
Name: | LARK_StockDividendPercentage
Namespace Prefix: | LARK_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration