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Schedule of Segment Reporting Information, by Segment Balance Sheet Item (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Jul. 31, 2013
Jul. 31, 2012
Jul. 31, 2011
Segment Reporting Information [Line Items]      
Identifiable assets $ 1,328,268 $ 1,243,054 $ 1,198,070
Depreciation and amortization expense, total 24,987 24,978 24,009
Capital acquisitions 24,190 10,442 33,698
Buses
      
Segment Reporting Information [Line Items]      
Identifiable assets   143,324 126,224
Continuing Operations | Recreation Vehicles
      
Segment Reporting Information [Line Items]      
Identifiable assets 885,781 817,343 789,645
Depreciation and amortization expense, total 21,928 22,132 20,980
Capital acquisitions 15,627 9,628 24,228
Continuing Operations | Recreation Vehicles | Towables
      
Segment Reporting Information [Line Items]      
Identifiable assets 759,658 734,439 696,059
Depreciation and amortization expense, total 19,888 20,010 18,506
Capital acquisitions 13,954 8,830 22,835
Continuing Operations | Recreation Vehicles | Motorized
      
Segment Reporting Information [Line Items]      
Identifiable assets 126,123 82,904 93,586
Depreciation and amortization expense, total 2,040 2,122 2,474
Capital acquisitions 1,673 798 1,393
Continuing Operations | Corporate
      
Segment Reporting Information [Line Items]      
Identifiable assets 305,981 282,387 282,201
Depreciation and amortization expense, total 322 309 313
Capital acquisitions 8,143 43 53
Discontinued Operations
      
Segment Reporting Information [Line Items]      
Identifiable assets 136,506    
Depreciation and amortization expense, total 2,737 2,537 2,716
Capital acquisitions $ 420 $ 771 $ 9,417