GOODWILL AND INTANGIBLE ASSETS - Additional Information (Detail) - USD ($)	9 Months Ended
	Apr. 30, 2020	Jul. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 257,128,000	$ 257,128,000
Gross carrying amount	213,250,000	213,250,000
Accumulated amortization	71,451,000	50,732,000
Intangible assets	$ 141,799,000	162,518,000
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	15 years
Gross carrying amount	$ 192,730,000	192,730,000
Accumulated amortization	55,206,000	39,617,000
Intangible assets	$ 137,524,000	153,113,000
Trademarks and Trade Names
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	3 years
Gross carrying amount	$ 20,520,000	20,520,000
Accumulated amortization	16,245,000	11,115,000
Intangible assets	4,275,000	$ 9,405,000
Direct Marketing
Finite-Lived Intangible Assets [Line Items]
Goodwill	257,100,000
Reporting unit, amount of fair value in excess of carrying amount	30,000,000
Goodwill impairment	$ 0