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U.S. Pension Plan Investment Allocations by Asset Category (Detail) - USD ($) $ in Thousands | Aug. 31, 2019 | Aug. 31, 2018
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Schedule of Pension Plan Assets by Fair Value [Line Items] |  |
Defined Benefit Plan, Plan Assets, Amount | $ 40,412 | $ 40,244
Percentage of fair value of pension plan assets | 100.00% | 100.00%
Cash and cash equivalents | Fair Value, Inputs, Level 1 |  |
Schedule of Pension Plan Assets by Fair Value [Line Items] |  |
Defined Benefit Plan, Plan Assets, Amount | $ 304 | $ 559
Percentage of fair value of pension plan assets | 0.80% | 1.40%
Fixed Income Securities | Fair Value, Inputs, Level 2 |  |
Schedule of Pension Plan Assets by Fair Value [Line Items] |  |
Defined Benefit Plan, Plan Assets, Amount | $ 28,333 | $ 19,921
Percentage of fair value of pension plan assets | 70.10% | 49.50%
Fixed Income Securities | Corporate Bond Securities | Fair Value, Inputs, Level 2 |  |
Schedule of Pension Plan Assets by Fair Value [Line Items] |  |
Defined Benefit Plan, Plan Assets, Amount | $ 5,127 | $ 19,107
Percentage of fair value of pension plan assets | 12.70% | 47.50%
Fixed Income Securities | Mutual Funds | Fair Value, Inputs, Level 2 |  |
Schedule of Pension Plan Assets by Fair Value [Line Items] |  |
Defined Benefit Plan, Plan Assets, Amount | $ 23,206 | $ 814
Percentage of fair value of pension plan assets | 57.40% | 2.00%
Equity Securities | Mutual Funds | Fair Value, Inputs, Level 1 |  |
Schedule of Pension Plan Assets by Fair Value [Line Items] |  |
Defined Benefit Plan, Plan Assets, Amount | $ 11,775 | $ 19,764
Percentage of fair value of pension plan assets | 29.10% | 49.10%

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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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