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Accounts Receivable Accounts Receivable (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jan. 31, 2021 | 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 | $ 469,359 | $ 356,597
Less: Allowance for credit loss | 6,954 | 6,390
Accounts receivable, net | 462,405 | 350,207
Advance charges receivable |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Accounts Receivable, before Allowance for Credit Loss, Current | 368,360 | 260,196
Trade accounts receivable |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Accounts Receivable, before Allowance for Credit Loss, Current | 98,412 | 94,281
Other receivables |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Accounts Receivable, before Allowance for Credit Loss, Current | $ 2,587 | $ 2,120

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