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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, 2014
Jul. 31, 2013
Jul. 31, 2012
Segment Reporting Information [Line Items]      
Total assets $ 1,408,718 $ 1,328,268 $ 1,243,054
Depreciation and amortization expense, total 25,834 24,987 24,978
Capital acquisitions 30,438 24,190 10,442
Buses
      
Segment Reporting Information [Line Items]      
Total assets     143,324
Continuing Operations | Recreation Vehicles
      
Segment Reporting Information [Line Items]      
Total assets 1,038,268 885,781 817,343
Depreciation and amortization expense, total 24,551 21,928 22,132
Capital acquisitions 22,856 15,627 9,628
Continuing Operations | Recreation Vehicles | Towables
      
Segment Reporting Information [Line Items]      
Total assets 868,017 759,658 734,439
Depreciation and amortization expense, total 22,192 19,888 20,010
Capital acquisitions 16,914 13,954 8,830
Continuing Operations | Recreation Vehicles | Motorized
      
Segment Reporting Information [Line Items]      
Total assets 170,251 126,123 82,904
Depreciation and amortization expense, total 2,359 2,040 2,122
Capital acquisitions 5,942 1,673 798
Continuing Operations | Corporate
      
Segment Reporting Information [Line Items]      
Total assets 370,450 305,981 282,387
Depreciation and amortization expense, total 724 322 309
Capital acquisitions 7,519 8,143 43
Discontinued Operations
      
Segment Reporting Information [Line Items]      
Total assets   136,506  
Depreciation and amortization expense, total 559 2,737 2,537
Capital acquisitions $ 63 $ 420 $ 771