DEBT Debt (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2024	Jul. 31, 2023
Debt Instrument
Shelf Notes	$ 75,000
Unsecured Debt	75,000	$ 50,000
Letters of Credit Outstanding, Amount	2,900	1,000
Line of Credit Facility, Remaining Borrowing Capacity	$ 32,100	44,000
Line of Credit [Member]
Debt Instrument
Annual rate	6.66%
Long-Term Debt	$ 10,000	0
Maximum borrowing capacity	45,000
Maximum borrowing capacity for letters of credit	$ 10,000
Expiration date	Aug. 30, 2027
Series B Senior Notes
Debt Instrument
Starting payments	May 15, 2020
Face amount	$ 10,000
Annual rate	3.95%
Ending payments	May 15, 2030
Long-Term Debt	$ 6,000	7,000
Series C Senior Notes
Debt Instrument
Starting payments	Dec. 16, 2021
Face amount	$ 25,000
Annual rate	3.25%
Ending payments	Dec. 16, 2031
Long-Term Debt	$ 25,000	25,000
Series D Senior Notes
Debt Instrument
Starting payments	Apr. 30, 2024
Face amount	$ 10,000
Annual rate	6.47%
Ending payments	Apr. 30, 2033
Long-Term Debt	$ 10,000	$ 0
Prime Rate | Line of Credit [Member]
Debt Instrument
Variable interest rate	8.50%
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Line of Credit [Member]
Debt Instrument
Variable interest rate	6.49%