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Consolidated Statements of Earnings (Unaudited) (Parenthetical)	6 Months Ended
	Jun. 30, 2023
Consolidated Statements Of Earnings Unaudited
Stock dividend percentage	5.00%

X

- References

No definition available.

+ Details

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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