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Commitments And Contingencies (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract] |
CDSOA receipts | $ 0.3

X
- Definition The aggregate amount of other income resulting from distributions received under the Continued Dumping and Subsidy Offset Act of 2000. + References No definition available. + Details
Name: | lanc_OtherIncomeContinuedDumpingAndSubsidyOffsetAct
Namespace Prefix: | lanc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration