SEGMENT INFORMATION - Summarized Financial Information of Net Revenue from External Customers by Group of Services (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2020	Jan. 31, 2019
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	$ 215,452	$ 206,223	$ 440,605	$ 421,356
Supply Chain
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	92,335	87,776	184,485	174,815
Direct Marketing
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	123,117	118,447	256,120	246,541
Supply Chain
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	92,335	87,776	184,485	174,815
Direct Marketing
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	$ 123,117	$ 118,447	$ 256,120	$ 246,541