Leases - Components of Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
Leases [Abstract]
Operating lease cost	$ 6,908	$ 3,881	$ 13,216	$ 7,758
Amortization of right-of-use assets	187	175	373	311
Interest on lease liabilities	120	131	245	257
Total lease cost	$ 7,215	$ 4,187	$ 13,834	$ 8,326