LEASES - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2021	Jan. 31, 2020
Cash paid for amounts included in measurement of lease liabilities:
Operating cash flows from operating leases	$ 8,377	$ 8,769
Operating cash flows from finance leases	3	5
Financing cash flows from finance leases	$ 35	$ 79	$ 35	$ 79