Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Name:	us-gaap_GoodwillImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

GOODWILL AND INTANGIBLE ASSETS - Additional Information (Detail) - USD ($)	9 Months Ended	12 Months Ended
	Apr. 30, 2020	Jul. 31, 2020	Jul. 31, 2019
Goodwill [Line Items]
Goodwill		$ 257,128,000	$ 257,128,000
Goodwill impairment loss		0
Direct Marketing
Goodwill [Line Items]
Goodwill		$ 257,100,000
Reporting unit, amount of fair value in excess of carrying amount	$ 30,000,000
Goodwill impairment loss	$ 0