XML 24 R1.htm IDEA: XBRL DOCUMENT  v2.3.0.11
Document And Entity Information (USD $)
 12 Months Ended
Jul. 31, 2011
Sep. 15, 2011
Jan. 31, 2011
Document And Entity Information      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Jul. 31, 2011
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2011    
Entity Registrant Name THOR INDUSTRIES INC    
Entity Central Index Key 0000730263    
Current Fiscal Year End Date --07-31    
Entity Filer Category Large Accelerated Filer    
Entity Common Stock, Shares Outstanding   54,840,010  
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Well-known Seasoned Issuer Yes    
Entity Public Float     $ 1,369,969,879