Acquisition (Tables)
 9 Months Ended
Apr. 30, 2012
Business Acquisition [Line Items]  
Schedule Of Unaudited Pro Forma Information
     Nine Months Ended
April 30, 2011		  

Net sales

            $ 2,046,862   

Net income

            $ 72,512   

Basic earnings per common share

            $ 1.30   

Diluted earnings per common share

            $ 1.30   
Heartland Recreational Vehicles, LLC, [Member]
  
Business Acquisition [Line Items]  
Internal And Independent External Evaluations Of Net Assets Acquired

Current assets

     $ 48,913   

Property, plant and equipment

      9,993   

Dealer network

      67,000   

Goodwill

      94,308   

Trademarks

      25,200   

Design technology assets

      21,300   

Non-compete agreements

      4,130   

Backlog

      690   

Current liabilities

      (41,830)   

Deferred income tax liabilities

      (37,364)   

Other liabilities

      (2,077)   
  

 

 

  

Total fair value of net assets acquired

     $       190,263