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Accounts Receivable Accounts Receivable (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Oct. 31, 2020 | Jul. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Revenue, Practical Expedient, Financing Component [true false] | true |
Accounts Receivable, before Allowance for Credit Loss, Current | $ 414,409 | $ 356,597
Less: Allowance for credit loss | 6,512 | 6,390
Accounts receivable, net | 407,897 | 350,207
Advance charges receivable |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Accounts Receivable, before Allowance for Credit Loss, Current | 314,371 | 260,196
Trade accounts receivable |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Accounts Receivable, before Allowance for Credit Loss, Current | 97,583 | 94,281
Other receivables |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Accounts Receivable, before Allowance for Credit Loss, Current | $ 2,455 | $ 2,120

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