OTHER GAINS (LOSSES) , NET - Other Gains (Losses), Net - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Component Of Other Expense Income Nonoperating [Line Items]
Gains (losses) in trading securities	$ 0	$ 0	$ 0	$ 1,876
Foreign currency exchange gains (losses)	(33)	720	(601)	(1,351)
Corporate Segment
Component Of Other Expense Income Nonoperating [Line Items]
Net realized and unrealized foreign currency exchange gain (losses)	1,000	1,400	1,600	(800)
e-Business services
Component Of Other Expense Income Nonoperating [Line Items]
Net realized and unrealized foreign currency exchange gain (losses)	(200)		(400)
Asia
Component Of Other Expense Income Nonoperating [Line Items]
Net realized and unrealized foreign currency exchange gain (losses)			(500)	(1,000)
Europe
Component Of Other Expense Income Nonoperating [Line Items]
Net realized and unrealized foreign currency exchange gain (losses)	$ (800)	$ (600)	$ (1,400)	400
Cash
Component Of Other Expense Income Nonoperating [Line Items]
Gains (losses) in trading securities				$ 1,900