Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Leases [Abstract]
Operating Lease, Payments	$ 4,297	$ 4,010
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	2,936	9,952
Operating Lease, Cost	$ 4,073	$ 5,405