Segment Information Net Sales by Segment and Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Net Sales by Segment and Geographic Area
Net sales	$ 289,745	$ 298,421	$ 865,367	$ 876,352
Americas
Net Sales by Segment and Geographic Area
Net sales	169,335	167,851	502,532	494,018
Europe
Net Sales by Segment and Geographic Area
Net sales	87,356	96,094	258,910	277,510
Asia-Pacific
Net Sales by Segment and Geographic Area
Net sales	33,054	34,476	103,925	104,824
ID Solutions
Net Sales by Segment and Geographic Area
Net sales	213,979	212,154	641,283	628,291
ID Solutions | Americas
Net Sales by Segment and Geographic Area
Net sales	143,557	139,061	427,671	412,271
ID Solutions | Europe
Net Sales by Segment and Geographic Area
Net sales	48,984	51,248	145,094	147,623
ID Solutions | Asia-Pacific
Net Sales by Segment and Geographic Area
Net sales	21,438	21,845	68,518	68,397
Workplace Safety
Net Sales by Segment and Geographic Area
Net sales	75,766	86,267	224,084	248,061
Workplace Safety | Americas
Net Sales by Segment and Geographic Area
Net sales	25,778	28,790	74,861	81,747
Workplace Safety | Europe
Net Sales by Segment and Geographic Area
Net sales	38,372	44,846	113,816	129,887
Workplace Safety | Asia-Pacific
Net Sales by Segment and Geographic Area
Net sales	$ 11,616	$ 12,631	$ 35,407	$ 36,427