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Leases (Lease Liabilities) (Details)	Jul. 31, 2021 USD ($)
Operating
Fiscal 2022	$ 10,376,000
Fiscal 2023	8,029,000
Fiscal 2024	6,657,000
Fiscal 2025	6,123,000
Fiscal 2026	4,675,000
Thereafter	20,810,000
Total future undiscounted cash flows	56,670,000
Less: Present value discount	8,260,000
Lease liabilities	$ 48,410,000
Weighted-average remaining lease terms (in years)	8 years 10 months 20 days
Weighted-average discount rate	3.52%
Finance
Fiscal 2022	$ 32,000
Fiscal 2023	3,000
Fiscal 2024	0
Fiscal 2025	0
Fiscal 2026	0
Thereafter	0
Total future undiscounted cash flows	35,000
Less: Present value discount	1,000
Lease liabilities	$ 34,000
Weighted-average remaining lease terms (in years)	1 year 5 months 26 days
Weighted-average discount rate	7.37%
Total
Fiscal 2022	$ 10,408,000
Fiscal 2023	8,032,000
Fiscal 2024	6,657,000
Fiscal 2025	6,123,000
Fiscal 2026	4,675,000
Thereafter	20,810,000
Total future undiscounted cash flows	56,705,000
Less: Present value discount	8,261,000
Lease liabilities	$ 48,444,000

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