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Revenue Recognition (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Oct. 31, 2020 | Oct. 31, 2019
Disaggregation of Revenue [Line Items] |  |
Net sales | $ 2,537,360 | $ 2,158,785
Operating segments | Recreational vehicles |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 2,488,387 | 2,109,784
Operating segments | North America | Recreational vehicles |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 1,885,899 | 1,616,777
Operating segments | Europe | Recreational vehicles |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 602,488 | 493,007
Operating segments | Travel Trailers and Other | North America | Recreational vehicles |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 837,900 | 709,665
Operating segments | Fifth Wheels | North America | Recreational vehicles |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 554,144 | 491,223
Operating segments | North American Towables | North America | Recreational vehicles |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 1,392,044 | 1,200,888
Operating segments | Class A | North America | Recreational vehicles |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 158,555 | 161,732
Operating segments | Class C | North America | Recreational vehicles |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 275,399 | 229,837
Operating segments | Class B | North America | Recreational vehicles |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 59,901 | 24,320
Operating segments | North American Motorized | North America | Recreational vehicles |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 493,855 | 415,889
Operating segments | Motorcaravan | Europe | Recreational vehicles |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 318,343 | 281,733
Operating segments | Campervan | Europe | Recreational vehicles |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 143,400 | 77,597
Operating segments | Caravan | Europe | Recreational vehicles |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 55,195 | 61,032
Operating segments | Other RV-related | Europe | Recreational vehicles |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 85,550 | 72,645
Corporate and eliminations |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 80,707 | 73,566
Intercompany eliminations |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | $ (31,734) | $ (24,565)

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