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Postretirement and Other Employee Benefits (Benefit Obligations and Plan Assets, Changes in Benefit Obligation and Plan Assets and Funded Status of Plans) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Aug. 31, 2019 | Aug. 31, 2018 | Aug. 31, 2017
Change in projected benefit obligation |  |  |
Beginning projected benefit obligation | $ 161,104 | $ 167,714 |
Service cost | 1,437 | 1,063 | $ 1,068
Interest cost | 3,715 | 3,807 | 2,942
Actuarial loss (gain) | 19,060 | (6,019) |
Curtailments gain | 0 | (998) |
Total benefits paid | (6,568) | (6,211) |
Plan participants’ contributions | 35 | 31 |
Amendments | 0 | 1,864 |
Acquisitions | 6,040 | 0 |
Effect of conversion to U.S. dollars | (10,133) | (147) |
Ending projected benefit obligation | 174,690 | 161,104 | 167,714
Change in plan assets |  |  |
Beginning fair value of plan assets | 151,715 | 146,698 |
Actual return on plan assets | 19,784 | 8,146 |
Employer contributions | 1,717 | 1,811 |
Benefits paid from plan assets | (5,435) | (4,758) |
Plan participants’ contributions | 35 | 31 |
Effect of conversion to U.S. dollars | (9,715) | (213) |
Ending fair value of plan assets | 158,101 | 151,715 | $ 146,698
Unfunded status | (16,589) | (9,389) |
Amounts recognized in the Consolidated Balance Sheets |  |  |
Accrued benefit liability, current | 368 | 428 |
Accrued benefit liability, noncurrent | 16,221 | 8,961 |
Accumulated other comprehensive loss |  |  |
Actuarial loss, before tax | 24,343 | 22,387 |
Prior service cost, before tax | 690 | $ 719 |
Net actuarial loss expected to be amortized to net period benefit cost in next fiscal year | 800 |  |
Prior service cost expected to be amortized to net periodic benefit cost in next fiscal year | $ 0 |  |

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