Fair Values of Financial Instruments Fair Values of Financial Instruments (Details) - Phantom Share Units (PSUs) $ in Thousands	Jul. 31, 2021 USD ($)
Fair Value Disclosures [Abstract]
Other Deferred Compensation Arrangements, Liability, Classified, Noncurrent	$ 2,144
Other Deferred Compensation Arrangements, Liability, Current and Noncurrent	6,317
Other Deferred Compensation Arrangements, Liability, Current	4,173
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Deferred Compensation Arrangements, Liability, Current	4,173
Other Deferred Compensation Arrangements, Liability, Classified, Noncurrent	$ 2,144