ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME Accumulated Other Comprehensive Income (Details) - USD ($)	12 Months Ended
	Jul. 31, 2020	Jul. 31, 2019
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive (Loss) Income, beginning balance	$ (15,039,000)
Other Comprehensive (Loss) Income	2,785,000	$ (4,424,000)
Accumulated Other Comprehensive (Loss) Income, ending balance	(12,254,000)	(15,039,000)
Pension and Postretirement Health Benefits
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive (Loss) Income, beginning balance	(14,891,000)	(10,384,000)
Other comprehensive income (loss), before reclassifications, net of tax	(4,431,000)	(5,089,000)
Amounts reclassified from accumulated other comprehensive income, net of tax	758,000	582,000
Curtailment/Settlement on Pension Plan	6,570,000
Other Comprehensive (Loss) Income	2,897,000	(4,507,000)
Accumulated Other Comprehensive (Loss) Income, ending balance	(11,994,000)	(14,891,000)
Tax on Other comprehensive (loss) incomes, Pension and postretirement benefit Plans before reclassifications	(1,359,000)	1,607,000
Tax on amount reclassified from AOCI, Pension and postretirement health benefits	242,000	185,000
Other Comprehensive Income (Loss), Defined Benefit Plan, Adjustment for Settlement or Curtailment Gain (Loss), Tax	2,075,000
Cumulative Translation Adjustment
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive (Loss) Income, beginning balance	(148,000)	(231,000)
Other comprehensive income (loss), before reclassifications, net of tax	(112,000)	83,000
Amounts reclassified from accumulated other comprehensive income, net of tax	0	0
Curtailment/Settlement on Pension Plan	0
Other Comprehensive (Loss) Income	(112,000)	83,000
Accumulated Other Comprehensive (Loss) Income, ending balance	(260,000)	(148,000)
AOCI Attributable to Parent
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive (Loss) Income, beginning balance	(15,039,000)	(10,615,000)
Other comprehensive income (loss), before reclassifications, net of tax	(4,543,000)	(5,006,000)
Amounts reclassified from accumulated other comprehensive income, net of tax	758,000	582,000
Curtailment/Settlement on Pension Plan	6,570,000
Other Comprehensive (Loss) Income	2,785,000	(4,424,000)
Accumulated Other Comprehensive (Loss) Income, ending balance	$ (12,254,000)	$ (15,039,000)