GOODWILL AND INTANGIBLE ASSETS Schedule of amortization expense (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 6,531	$ 7,278	$ 20,719	$ 23,168
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	4,825	5,564	15,589	18,038
Trademarks and Trade Names
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 1,706	$ 1,714	$ 5,130	$ 5,130

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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