Asset Impairments (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Apr. 30, 2021 |
Apr. 30, 2020 |
Apr. 30, 2021 |
Apr. 30, 2020 |
|
| Impairment Effects on Earnings Per Share [Line Items] | ||||
| Asset Impairment Charges | $ 0 | $ 28,372 | $ 0 | $ 28,372 |
| Goodwill | ||||
| Impairment Effects on Earnings Per Share [Line Items] | ||||
| Asset Impairment Charges | 25,700 | |||
| Finite-Lived Intangible Assets | ||||
| Impairment Effects on Earnings Per Share [Line Items] | ||||
| Asset Impairment Charges | $ 2,700 | |||