Summary of Significant Accounting and Reporting Policies (Remaining Performance Obligations) (Details) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-08-01	Jul. 31, 2019 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations, amount	$ 682,954,000
Remaining performance obligations, period	12 months