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Inventories - Schedule of Major Classifications of Inventories (Detail) - USD ($) $ in Thousands | Oct. 31, 2020 | Jul. 31, 2020
--- | --- | ---
Inventory [Line Items] |  |
Work in process | $ 209,155 | $ 128,181
Raw materials | 387,516 | 302,813
Chassis | 334,392 | 135,194
Subtotal | 1,086,209 | 763,264
Excess of FIFO costs over LIFO costs | (47,959) | (46,959)
Total inventories, net | 1,038,250 | 716,305
Recreational vehicles |  |
Inventory [Line Items] |  |
Finished products | 108,327 | 152,297
Other |  |
Inventory [Line Items] |  |
Finished products | $ 46,819 | $ 44,779

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