SEGMENT INFORMATION - Summarized Financial Information of Net Revenue from External Customers by Group of Services (Detail) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	$ 169,934	$ 225,153
Direct Marketing
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	105,708	133,003
Supply Chain
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	64,226	92,150
Direct Marketing
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	105,708	133,003
Supply Chain
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	$ 64,226	$ 92,150