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Accounts Receivable Accounts Receivable (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2018	Jul. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenue, Practical Expedient, Financing Component [true false]	0
Accounts Receivable, Gross, Current	$ 341,558	$ 357,045
Less: Allowance for doubtful accounts	5,554	5,444
Accounts receivable, net	336,004	351,601
Advance Charges Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Gross, Current	260,459	230,092
Trade Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Gross, Current	79,229	125,255
Other Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Gross, Current	$ 1,870	$ 1,698

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+ References

No definition available.

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Amounts due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer) for goods or services (including trade receivables) that have been delivered or sold in the normal course of business.

+ References

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+ References

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-Publisher FASB
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A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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