Segment Information - Schedule of Segment Reporting Information By Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2019	Oct. 31, 2018
Segment Reporting Information [Line Items]
Net sales	$ 286,947	$ 293,196
Segment Profit	47,600	47,103
ID Solutions
Segment Reporting Information [Line Items]
Net sales	214,987	218,100
Segment Profit	42,443	41,562
Workplace Safety
Segment Reporting Information [Line Items]
Net sales	71,960	75,096
Segment Profit	5,157	5,541
Americas
Segment Reporting Information [Line Items]
Net sales	173,666	170,542
Americas | ID Solutions
Segment Reporting Information [Line Items]
Net sales	149,363	145,791
Americas | Workplace Safety
Segment Reporting Information [Line Items]
Net sales	24,303	24,751
Europe
Segment Reporting Information [Line Items]
Net sales	79,407	86,483
Europe | ID Solutions
Segment Reporting Information [Line Items]
Net sales	43,381	48,828
Europe | Workplace Safety
Segment Reporting Information [Line Items]
Net sales	36,026	37,655
Asia-Pacific
Segment Reporting Information [Line Items]
Net sales	33,874	36,171
Asia-Pacific | ID Solutions
Segment Reporting Information [Line Items]
Net sales	22,243	23,481
Asia-Pacific | Workplace Safety
Segment Reporting Information [Line Items]
Net sales	$ 11,631	$ 12,690