Intangible Assets and Long-Lived Assets - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of Intangible Assets	$ 7,077	$ 5,219	$ 5,776
Finite-Lived Intangible Asset, Expected Amortization, Year One	15,160
Finite-Lived Intangible Asset, Expected Amortization, Year Two	12,208
Finite-Lived Intangible Asset, Expected Amortization, Year Three	9,739
Finite-Lived Intangible Assets, Amortization Expense, Year Four	9,414
Finite-Lived Intangible Asset, Expected Amortization, Year Five	8,529
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)		8,665
Tangible Asset Impairment Charges		2,681
Operating Lease, Impairment Loss		2,475
Impairment charges	$ 0	13,821	$ 0
Identification Solutions
Impaired Long-Lived Assets Held and Used [Line Items]
Tangible Asset Impairment Charges		2,353
Operating Lease, Impairment Loss		440
Impairment charges		2,792
Workplace Safety
Impaired Long-Lived Assets Held and Used [Line Items]
Tangible Asset Impairment Charges		328
Operating Lease, Impairment Loss		2,035
Impairment charges		$ 11,029