Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Leases [Abstract]
Renewal term	40 years
Operating lease expense	$ 7,067	$ 7,257
Amortization of right-of-use assets	153	167
Interest on finance lease liabilities	2	21
Short-term lease expense	1,768	1,245
Variable lease expense	224	539
Total lease expense	$ 9,214	$ 9,229