Defined Contribution And Other Employee Plans (Schedule Of Deferred Compensation Expense) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Defined Contribution And Other Employee Plans [Abstract]
Deferred compensation expense	$ 101	$ 88	$ 80

Expense recognized during the reporting period related to interest on deferred compensation balances.

No definition available.

Name:	lanc_DeferredCompensationExpenseInterest
Namespace Prefix:	lanc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration