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Schedule of Segment Reporting Information, by Segment Balance Sheet Item (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Jul. 31, 2018 | Jul. 31, 2017 | Jul. 31, 2016
Segment Reporting Information [Line Items] |  |  |
Total assets | $ 2,778,665 | $ 2,557,931 | $ 2,325,464
Depreciation and amortization expense, total | 93,223 | 98,258 | 52,575
Capital acquisitions | 137,306 | 117,755 | 53,974
Operating Segments | Recreational vehicles |  |  |
Segment Reporting Information [Line Items] |  |  |
Total assets | 2,147,191 | 2,035,790 | 1,902,141
Depreciation and amortization expense, total | 80,764 | 84,961 | 39,048
Capital acquisitions | 119,964 | 114,478 | 48,680
Operating Segments | Recreational vehicles | Towables |  |  |
Segment Reporting Information [Line Items] |  |  |
Total assets | 1,654,361 | 1,535,029 | 1,425,168
Depreciation and amortization expense, total | 68,964 | 75,568 | 36,054
Capital acquisitions | 85,304 | 72,801 | 37,489
Operating Segments | Recreational vehicles | Motorized |  |  |
Segment Reporting Information [Line Items] |  |  |
Total assets | 492,830 | 500,761 | 476,973
Depreciation and amortization expense, total | 11,800 | 9,393 | 2,994
Capital acquisitions | 34,660 | 41,677 | 11,191
Corporate and Eliminations [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total assets | 167,965 | 156,996 | 156,822
Depreciation and amortization expense, total | 10,861 | 11,967 | 12,352
Capital acquisitions | 8,440 | 1,157 | 2,799
Corporate, Non-Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total assets | 463,509 | 365,145 | 266,501
Depreciation and amortization expense, total | 1,598 | 1,330 | 1,175
Capital acquisitions | $ 8,902 | $ 2,120 | $ 2,495

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