Leases - Assets and Liabilities (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Jul. 31, 2020
Leases [Abstract]
Operating lease right-of-use assets	$ 38,545	$ 33,609
Operating lease liabilities:
Other current liabilities	7,672	5,343
Other long-term liabilities	31,126	28,456
Total operating lease liabilities	38,798	33,799
Finance lease right-of-use assets	7,196	3,672
Finance lease liabilities
Other current liabilities	1,014	505
Other long-term liabilities	5,018	4,743
Total finance lease liabilities	$ 6,032	$ 5,248
Weighted-aver remaining lease term - operating leases	11 years 9 months 18 days	13 years 7 months 6 days
Weighted-aver remaining lease term - finance leases	5 years 3 months 18 days	6 years 9 months 18 days
Weighted-average discount rate - operating leases	3.20%	3.40%
Weighted-average discount rate - finance leases	8.90%	9.70%
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other	Other
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other liabilities	Other liabilities
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other	Other
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other liabilities	Other liabilities
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property, plant and equipment, net	Property, plant and equipment, net
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property, plant and equipment, net	Property, plant and equipment, net