Summary of Significant Accounting Policies Recently Issued Accounting Standards (Details) - USD ($) $ in Thousands	3 Months Ended
Oct. 31, 2018	Oct. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Cumulative effect for adoption of revenue standard (Notes 2 & 3)	$ (7,517)
Increase (Decrease) in Restricted Cash for Operating Activities	6,700
Restricted cash	12,005	$ 16,609	$ 6,895	$ 10,300
Issuance of shares under share award plans, net of shares withheld for employee taxes	11,364	$ 69,480
Retained Earnings [Member]
Cumulative effect for adoption of revenue standard (Notes 2 & 3)	(7,517)
Accounts Payable and Accrued Liabilities [Member]
Cumulative effect for adoption of revenue standard (Notes 2 & 3)	$ 7,517

The net cash inflow or outflow for the increase (decrease) associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as operating activities. This may include cash restricted for regulatory purposes.

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Represents the quantification of the effect of adopting the new accounting standard or change in accounting principle expected by the entity to have a significant effect on the entity's financial statements.

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Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Value of stock (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of stock value of such awards forfeited. Stock issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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