Commitments And Contingencies (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Commitments And Contingencies [Abstract]
CDSOA receipts	$ 0	$ 0	$ 293	$ 2,701

The aggregate amount of other income resulting from distributions received under the Continued Dumping and Subsidy Offset Act of 2000.

No definition available.

Name:	lanc_OtherIncomeContinuedDumpingAndSubsidyOffsetAct
Namespace Prefix:	lanc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration