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Inventories - Additional Information (Detail) - USD ($) $ in Thousands | 9 Months Ended |  |
--- | --- | --- | ---
Apr. 30, 2019 | Feb. 01, 2019 | Jul. 31, 2018
Inventories | $ 1,008,537 |  | $ 579,758
Subsidiaries valued inventory in last-in, first-out method | 312,757 |  | 305,990
Subsidiaries valued inventory in first-in, first-out method | 695,780 |  | $ 273,768
Erwin Hymer Group [Member] |  |  |
Subsidiaries valued inventory in first-in, first-out method |  | $ 593,053 |
Erwin Hymer Group [Member] | FIFO [Member] |  |  |
Subsidiaries valued inventory in first-in, first-out method | 441,081 |  |
Change In FIFO Inventory | 422,012 |  |
Erwin Hymer Group [Member] | Finished Goods [Member] |  |  |
Subsidiaries valued inventory in first-in, first-out method | 197,356 |  |
Change In Inventory Finished Goods | $ 224,271 |  |

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- Definition The amount of FIFO (first in first out) inventory present at the reporting date when inventory is also valued using different valuation methods. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766 + Details
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- Definition The amount of LIFO (last in first out) inventory present at the reporting date when inventory is also valued using different valuation methods. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766 + Details
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