Segment Information - Schedule of Segment Reporting Information By Segment (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jul. 31, 2020	Apr. 30, 2020	Jan. 31, 2020	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Segment Reporting Information [Line Items]
Net sales	$ 251,744	$ 265,943	$ 276,665	$ 286,947	$ 295,278	$ 289,745	$ 282,426	$ 293,196	$ 1,081,299	$ 1,160,645	$ 1,173,851
Depreciation and amortization									23,437	23,799	25,442
Segment profit									171,658	187,978	175,123
Assets	1,142,466				1,157,308				1,142,466	1,157,308	1,056,931
Expenditures for property, plant & equipment									27,277	32,825	21,777
Americas [Member]
Segment Reporting Information [Line Items]
Net sales									624,870	675,944	663,082
Europe [Member]
Segment Reporting Information [Line Items]
Net sales									317,897	344,332	368,002
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net sales									138,532	140,369	142,767
Identification Solutions
Segment Reporting Information [Line Items]
Net sales									784,707	863,100	846,087
Depreciation and amortization									20,745	21,387	22,075
Segment profit									150,639	164,953	143,411
Assets	737,589				740,437				737,589	740,437	737,174
Expenditures for property, plant & equipment									17,637	17,849	17,283
Identification Solutions | Americas [Member]
Segment Reporting Information [Line Items]
Net sales									532,357	577,156	556,172
Identification Solutions | Europe [Member]
Segment Reporting Information [Line Items]
Net sales									165,490	193,852	197,737
Identification Solutions | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net sales									86,860	92,092	92,178
Workplace Safety
Segment Reporting Information [Line Items]
Net sales									296,592	297,545	327,764
Depreciation and amortization									2,692	2,412	3,367
Segment profit									21,019	23,025	31,712
Assets	187,234				137,799				187,234	137,799	138,329
Expenditures for property, plant & equipment									9,640	14,976	4,494
Workplace Safety | Americas [Member]
Segment Reporting Information [Line Items]
Net sales									92,513	98,788	106,910
Workplace Safety | Europe [Member]
Segment Reporting Information [Line Items]
Net sales									152,407	150,480	170,265
Workplace Safety | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net sales									51,672	48,277	50,589
Corporate [Member]
Segment Reporting Information [Line Items]
Assets	$ 217,643				$ 279,072				$ 217,643	$ 279,072	$ 181,428