LEASES - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Cash paid for amounts included in measurement of lease liabilities:
Operating cash flows from operating leases	$ 4,239	$ 4,372
Operating cash flows from finance leases	2	4
Financing cash flows from finance leases	$ 17	$ 33