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Summary Of Significant Accounting Policies (Schedule Of Estimated Useful Lives) (Details)
12 Months Ended
Feb. 28, 2021
Buildings  
Property, Plant and Equipment [Line Items]  
Estimated useful life average, years 25 years
Leasehold improvements  
Property, Plant and Equipment [Line Items]  
Estimated useful life average, years 15 years
Minimum | Furniture, fixtures and equipment  
Property, Plant and Equipment [Line Items]  
Estimated useful life average, years 3 years
Maximum | Furniture, fixtures and equipment  
Property, Plant and Equipment [Line Items]  
Estimated useful life average, years 15 years