Summary of Significant Accounting Policies New Accounting Pronouncements (Details) - USD ($) $ in Thousands	Aug. 31, 2022	Aug. 31, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Lease, Right-of-Use Asset	$ 43,273	$ 51,589
Retained Earnings (Accumulated Deficit) [Abstract]
Retained earnings	$ 966,751	$ 953,339

The cumulative amount of the reporting entity's undistributed earnings or deficit.

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