Segment Information - Schedule of Segment Reporting Information By Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2018	Oct. 31, 2017
Segment Reporting Information [Line Items]
Net sales	$ 293,196	$ 290,151
Segment Profit	47,103	42,282
ID Solutions
Segment Reporting Information [Line Items]
Net sales	218,100	209,705
Segment Profit	41,562	35,837
Workplace Safety
Segment Reporting Information [Line Items]
Net sales	75,096	80,446
Segment Profit	5,541	6,445
Americas
Segment Reporting Information [Line Items]
Net sales	170,542	165,892
Americas | ID Solutions
Segment Reporting Information [Line Items]
Net sales	145,791	139,404
Americas | Workplace Safety
Segment Reporting Information [Line Items]
Net sales	24,751	26,488
Europe
Segment Reporting Information [Line Items]
Net sales	86,483	88,515
Europe | ID Solutions
Segment Reporting Information [Line Items]
Net sales	48,828	47,131
Europe | Workplace Safety
Segment Reporting Information [Line Items]
Net sales	37,655	41,384
Asia-Pacific
Segment Reporting Information [Line Items]
Net sales	36,171	35,744
Asia-Pacific | ID Solutions
Segment Reporting Information [Line Items]
Net sales	23,481	23,170
Asia-Pacific | Workplace Safety
Segment Reporting Information [Line Items]
Net sales	$ 12,690	$ 12,574