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Document And Entity Information
In Thousands
3 Months Ended
Sep. 30, 2011
Oct. 27, 2011
Document And Entity Information [Abstract]  
Document Type10-Q 
Amendment Flagfalse 
Document Fiscal Period FocusQ1 
Entity Central Index Key0000057515 
Entity Registrant NameLANCASTER COLONY CORP 
Entity Filer CategoryLarge Accelerated Filer 
Entity Common Stock, Shares Outstanding 27,245
Document Period End DateSep. 30, 2011
Document Fiscal Year Focus2012 
Current Fiscal Year End Date--06-30