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CONVERTIBLE SENIOR NOTES - Interest Expense (Details) - Convertible Debt - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Debt Instrument [Line Items]
Interest expense related to amortization of debt discount	$ 6,997	$ 6,550	$ 20,650	$ 7,250
Interest expense related to amortization of debt issuance costs	390	366	1,152	404
Total interest expense	$ 7,387	$ 6,916	$ 21,802	$ 7,654

X

- Definition

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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Amount of amortization expense attributable to debt issuance costs.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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