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Funded Status of Defined Benefit Pension Plans (Detail) - USD ($) $ in Thousands | Aug. 31, 2019 | Aug. 31, 2018 | Aug. 31, 2017
--- | --- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | $ 40,412 | $ 40,244 |
Pension Plans, Defined Benefit | Foreign Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Amount of benefits expected to be paid in fiscal 2020 | 200 |  |
Amount of benefits expected to be paid in fiscal 2021 | 300 |  |
Amount of benefits expected to be paid in fiscal 2022 | 400 |  |
Amount of benefits expected to be paid in, fiscal 2023 | 300 |  |
Amount of benefits expected to be paid fiscal 2025 through fiscal 2027 | 1,900 |  |
Defined Benefit Plan, Benefit Obligation | 15,103 | 13,056 | $ 13,423
Fair value of plan assets | 8,118 | 7,902 | $ 7,904
Funded status of the plans (underfunded) | $ (6,985) | $ (5,154) |

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