Stock-Based Compensation (Total Cost Of Stock-Based Compensation) (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
May 31, 2021 |
May 31, 2020 |
May 31, 2021 |
May 31, 2020 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Compensation cost | $ 2,370 | $ (5,104) | $ 5,127 | $ (1,460) |
| Long-Term Incentive Awards [Member] | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Compensation cost | 2,144 | (5,326) | 4,458 | (2,124) |
| Restricted Stock Awards [Member] | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Compensation cost | 175 | 175 | 525 | 525 |
| Employee Stock Purchase Plan [Member] | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Compensation cost | $ 51 | $ 47 | $ 144 | $ 139 |