PENSION AND OTHER POSTRETIREMENT BENEFITS Narrative (Details) - USD ($)	12 Months Ended
	Jul. 31, 2020	Jul. 31, 2019
Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax	$ 6,632,000
Other Comprehensive Income (Loss), Defined Benefit Plan, Adjustment for Settlement or Curtailment Gain (Loss), Tax	1,592,000
Accumulated benefit obligation	57,280,000	$ 54,696,000
Defined Benefit Plan First Voluntary Contribution	5,000,000
Defined Benefit Plan Second Voluntary Contribution	3,000,000
Pension plan estimated employer contributions in next fiscal year	0
Settlement cost	$ 2,012,000	0
Postretirement Health Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans
Health care cost trend rate assumed	7.20%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	4.50%
Defined Benefit Plan, Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate	2038
Settlement cost	$ 0	0
401K Plan
Defined Contribution Plan Disclosure
Contribution to defined contribution plans	$ 2,035,000	$ 764,000
Defined Contribution Plan, Employer Matching Contribution, Percent of Match Before Change	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Before Change	4.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	100.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	6.00%