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Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Jul. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 2,500	$ 2,900
Amortized intangibles:
Accumulated amortization	(27,668)		$ (25,142)
Net intangibles	52,617		55,156
Supply contracts and customer relationships
Amortized intangibles:
Gross carrying amount	49,072		49,109
Trade names
Amortized intangibles:
Gross carrying amount	23,518		23,501
Licenses and databases
Amortized intangibles:
Gross carrying amount	$ 7,695		$ 7,688

X

- Definition

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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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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

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