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CONSOLIDATED STATEMENTS OF EARNINGS [Parenthetical] | 3 Months Ended
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Mar. 31, 2012
Percentage Of Stocks Dividend | 5.00%

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- Definition The percentage rate used to calculate stock dividend payments. + References No definition available. + Details
Name: | lark_PercentageOfStocksDividend
Namespace Prefix: | lark_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration