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Schedule of Segment Reporting Information by Segment (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jan. 31, 2014
Jan. 31, 2013
Jan. 31, 2014
Jan. 31, 2013
Segment Reporting Information [Line Items]        
Net sales $ 635,330 $ 636,605 $ 1,435,293 $ 1,398,029
Income (loss) from continuing operations before income taxes 23,902 24,458 78,343 68,626
Recreation Vehicles
       
Segment Reporting Information [Line Items]        
Income (loss) from continuing operations before income taxes 30,108 30,968 89,175 82,116
Recreation Vehicles | Towables
       
Segment Reporting Information [Line Items]        
Income (loss) from continuing operations before income taxes 18,915 24,085 64,539 66,795
Recreation Vehicles | Motorized
       
Segment Reporting Information [Line Items]        
Income (loss) from continuing operations before income taxes 11,193 6,883 24,636 15,321
Corporate
       
Segment Reporting Information [Line Items]        
Income (loss) from continuing operations before income taxes (6,206) (6,510) (10,832) (13,490)
Continuing Operations | Recreation Vehicles
       
Segment Reporting Information [Line Items]        
Net sales 635,330 636,605 1,435,293 1,398,029
Continuing Operations | Recreation Vehicles | Towables
       
Segment Reporting Information [Line Items]        
Net sales 472,474 522,838 1,095,327 1,162,020
Continuing Operations | Recreation Vehicles | Motorized
       
Segment Reporting Information [Line Items]        
Net sales $ 162,856 $ 113,767 $ 339,966 $ 236,009