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Accounting Records and Use of Estimates (Tables)
3 Months Ended
Oct. 31, 2019
Accounting Policies [Abstract]  
Schedule of property and equipment depreciation and amortization period

Amortization of improvements to leased property is calculated over the life of the lease. Lives used to determine depreciation and amortization are generally as follows:

       
               Buildings and improvements       18-40 years
    Improvements to leased property 3-10 years
    Fixtures and equipment 7-12 years
    Other 3-5 years