STOCKHOLDERS' EQUITY - Schedule of Restricted Stock Unit Activity (Detail) - Restricted Stock Units (RSUs) - $ / shares	12 Months Ended
Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested, beginning of year (in shares)	451,563	328,431	332,576
Granted (in shares)	407,151	310,924	171,340
Vested (in shares)	(206,624)	(167,591)	(168,714)
Forfeited (in shares)	(10,680)	(20,201)	(6,771)
Nonvested, end of year (in shares)	641,410	451,563	328,431
Nonvested, beginning of year, weighted average fair value (in dollars per share)	$ 91.08	$ 101.97	$ 69.41
Granted, weighted average fair value (in dollars per share)	50.78	79.12	124.84
Vested, weighted average fair value (in dollars per share)	92.87	90.23	64.01
Forfeited, weighted average fair value (in dollars per share)	69.66	91.11	93.46
Nonvested, end of year, weighted average fair value (in dollars per share)	$ 65.28	$ 91.08	$ 101.97

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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