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Temporary Differences and Carryforwards of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands | Aug. 31, 2019 | Aug. 31, 2018
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Deferred income tax assets: |  |
Deferred Tax Assets Operating Loss And Tax Credit Carryforwards | $ 88,198 | $ 38,414
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits | 7,752 | 8,821
Deferred Tax Assets, Tax Deferred Expense, Postretirement Benefits | 9,289 | 8,659
Deferred Tax Assets, Inventory | 629 | 520
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Other | 11,465 | 17,499
Total deferred income tax assets | 117,333 | 73,913
Valuation allowance | (73,255) | (32,426)
Net deferred income tax assets | 44,078 | 41,487
Deferred income tax liabilities: |  |
Depreciation and amortization | (26,248) | (23,517)
Other items | (862) | (611)
Deferred income tax liabilities | (27,110) | (24,128)
Net deferred income tax liability | (16,968) | (17,359)
Deferred Income Tax Assets, Net | 18,400 | 21,300
Deferred Income Tax Liabilities, Net | $ 1,600 | $ 3,900

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