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Schedule of Deferred Income Taxes (Detail) - Noncurrent Deferred Income Tax Assets (Liabilities) - USD ($) $ in Thousands | Jul. 31, 2018 | Jul. 31, 2017
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Schedule of Deferred Income Tax Assets and Liabilities [Line Items] |  |
Inventory basis | $ 922 | $ 1,460
Employee benefits | 3,427 | 6,471
Self-Insurance Reserves | 6,368 | 9,940
Accrued product warranties | 62,332 | 73,393
Accrued incentives | 5,235 | 6,175
Sales returns and allowances | 1,741 | 2,340
Accrued expenses | 1,905 | 3,399
Property, plant and equipment | (9,060) | (8,151)
Deferred compensation | 12,864 | 14,556
Intangibles | (9,151) | (17,184)
Unrecognized tax benefits | 2,581 | 3,925
Other | (720) | (3,355)
Deferred income tax asset, net | $ 78,444 | $ 92,969

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