Acquisitions - Pro Forma Summary of Operations (Details) - Hu-Friedy - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Jul. 31, 2020	Jul. 31, 2019
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Revenue of acquiree	$ 148,317
Net sales	1,054,972	$ 1,132,603
Net income	$ 8,690	$ 53,984
Basis earnings per common share (in dollars per share)	$ 0.20	$ 1.27
Diluted earnings per common share (in dollars per share)	$ 0.20	$ 1.27

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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-Publisher FASB
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The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

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