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Earnings per Share (Details Textual)	12 Months Ended
	Dec. 31, 2013
Basic And Diluted Earning Per Share [Line Items]
Stock Dividend Rate Percentage	5.00%

X

- Details

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Namespace Prefix:	lark_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

The percentage rate used to calculate dividend payments on stock.

+ References

No definition available.

+ Details

Name:	lark_StockDividendRatePercentage
Namespace Prefix:	lark_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration