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Summary of Significant Accounting and Reporting Policies (Remaining Performance Obligations) (Details) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-08-01
Jul. 31, 2021
USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligations, amount $ 658,896,000
Remaining performance obligations, period 24 months