DEFINED BENEFIT PENSION PLANS - Schedule of Defined Benefit Plan Assets Fair Value Measurements (Detail) - Pension Plan - USD ($) $ in Thousands	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	$ 29,050	$ 27,267	$ 22,860
Fair Value, Measurements, Recurring
Defined Benefit Plan Disclosure [Line Items]
Asset Allocations	100.00%	100.00%
Defined benefit plan, fair value of plan assets	$ 29,050	$ 27,267
Fair Value, Measurements, Recurring | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	0	0
Fair Value, Measurements, Recurring | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	0	0
Fair Value, Measurements, Recurring | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	$ 29,050	$ 27,267
Fair Value, Measurements, Recurring | Insurance contract
Defined Benefit Plan Disclosure [Line Items]
Asset Allocations	98.00%	98.00%
Defined benefit plan, fair value of plan assets	$ 28,388	$ 26,651
Fair Value, Measurements, Recurring | Insurance contract | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		0
Fair Value, Measurements, Recurring | Insurance contract | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		0
Fair Value, Measurements, Recurring | Insurance contract | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	$ 28,388	$ 26,651
Fair Value, Measurements, Recurring | Other investments
Defined Benefit Plan Disclosure [Line Items]
Asset Allocations	2.00%	2.00%
Defined benefit plan, fair value of plan assets	$ 662	$ 616
Fair Value, Measurements, Recurring | Other investments | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	0	0
Fair Value, Measurements, Recurring | Other investments | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	0	0
Fair Value, Measurements, Recurring | Other investments | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	$ 662	$ 616