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.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Jul. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Effect of foreign currency exchange rates	$ (1,046)
Amortization of Intangible Assets	1,800	$ 2,500
Amortized intangibles:
Accumulated amortization	(35,819)		$ (34,093)
Net intangibles	45,864		47,772
Supply contracts and customer relationships
Amortized intangibles:
Gross carrying amount	50,444		50,600
Trade names
Amortized intangibles:
Gross carrying amount	23,615		23,635
Licenses and databases
Amortized intangibles:
Gross carrying amount	$ 7,624		$ 7,630