SEGMENT INFORMATION - Summarized Financial Information of Net Revenue from External Customers by Group of Services (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	$ 177,351	$ 194,003	$ 617,956	$ 615,359
Direct Marketing
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	98,284	116,006	354,404	362,547
Supply Chain
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	79,067	77,997	263,552	252,812
Direct Marketing
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	98,284	116,006	354,404	362,547
Supply Chain
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	$ 79,067	$ 77,997	$ 263,552	$ 252,812