Goodwill and Other Intangible Assets Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
Jul. 31, 2019	Jul. 31, 2018
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 419,815	$ 437,697
Goodwill, Foreign Currency Translation Gain (Loss)	(8,828)	7,827
Goodwill, Ending Balance	410,987	419,815
Goodwill, Written off Related to Sale of Business Unit		(10,055)
Identification Solutions
Goodwill [Roll Forward]
Goodwill, Beginning Balance	385,524	391,864
Goodwill, Foreign Currency Translation Gain (Loss)	(6,519)	6,340
Goodwill, Ending Balance	379,005	385,524
Workplace Safety
Goodwill [Roll Forward]
Goodwill, Beginning Balance	34,291	45,833
Goodwill, Foreign Currency Translation Gain (Loss)	(2,309)	1,487
Goodwill, Ending Balance	$ 31,982	34,291
Goodwill, Written off Related to Sale of Business Unit		(10,055)
Id Solutions [Member]
Goodwill [Roll Forward]
Goodwill, Written off Related to Sale of Business Unit		$ 0

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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