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Fair Value Measurements (Assets Held For Sale Measured At Fair Value) (Details) - Fair Value, Nonrecurring - USD ($)
$ in Thousands
Nov. 30, 2020
Aug. 31, 2020
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Assets held for sale, assets with fair value exceeding carrying value $ 30,100  
Level 2    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Assets held for sale, assets with carrying value approximating fair value 36,100  
Carrying Amount | Level 2    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Assets held for sale $ 66,180 $ 67,380