Segment Information Net Sales by Segment and Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2021	Jan. 31, 2020
Net Sales by Segment and Geographic Area
Net sales	$ 265,838	$ 276,665	$ 543,065	$ 563,612
Americas
Net Sales by Segment and Geographic Area
Net sales	145,170	161,545	302,468	335,210
Europe
Net Sales by Segment and Geographic Area
Net sales	84,205	82,321	168,053	161,728
Asia-Pacific
Net Sales by Segment and Geographic Area
Net sales	36,463	32,799	72,544	66,674
ID Solutions
Net Sales by Segment and Geographic Area
Net sales	194,227	205,362	392,419	420,349
ID Solutions | Americas
Net Sales by Segment and Geographic Area
Net sales	124,970	137,909	258,237	287,271
ID Solutions | Europe
Net Sales by Segment and Geographic Area
Net sales	44,040	45,319	86,622	88,701
ID Solutions | Asia-Pacific
Net Sales by Segment and Geographic Area
Net sales	25,217	22,134	47,560	44,377
Workplace Safety
Net Sales by Segment and Geographic Area
Net sales	71,611	71,303	150,646	143,263
Workplace Safety | Americas
Net Sales by Segment and Geographic Area
Net sales	20,200	23,636	44,231	47,939
Workplace Safety | Europe
Net Sales by Segment and Geographic Area
Net sales	40,165	37,002	81,431	73,027
Workplace Safety | Asia-Pacific
Net Sales by Segment and Geographic Area
Net sales	$ 11,246	$ 10,665	$ 24,984	$ 22,297