Segment Information - Schedule of Segment Reporting Information By Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Segment Reporting Information [Line Items]
Net sales	$ 277,227	$ 286,947
Segment Profit	48,267	47,600
ID Solutions
Segment Reporting Information [Line Items]
Net sales	198,192	214,987
Segment Profit	40,279	42,443
Workplace Safety
Segment Reporting Information [Line Items]
Net sales	79,035	71,960
Segment Profit	7,988	5,157
Americas
Segment Reporting Information [Line Items]
Net sales	157,298	173,666
Americas | ID Solutions
Segment Reporting Information [Line Items]
Net sales	133,267	149,363
Americas | Workplace Safety
Segment Reporting Information [Line Items]
Net sales	24,031	24,303
Europe
Segment Reporting Information [Line Items]
Net sales	83,848	79,407
Europe | ID Solutions
Segment Reporting Information [Line Items]
Net sales	42,582	43,381
Europe | Workplace Safety
Segment Reporting Information [Line Items]
Net sales	41,266	36,026
Asia-Pacific
Segment Reporting Information [Line Items]
Net sales	36,081	33,874
Asia-Pacific | ID Solutions
Segment Reporting Information [Line Items]
Net sales	22,343	22,243
Asia-Pacific | Workplace Safety
Segment Reporting Information [Line Items]
Net sales	$ 13,738	$ 11,631