Segment Information Net Sales by Segment and Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2020	Jan. 31, 2019
Net Sales by Segment and Geographic Area
Net sales	$ 276,665	$ 282,426	$ 563,612	$ 575,622
Americas
Net Sales by Segment and Geographic Area
Net sales	161,545	162,656	335,210	333,197
Europe
Net Sales by Segment and Geographic Area
Net sales	82,321	85,070	161,728	171,554
Asia-Pacific
Net Sales by Segment and Geographic Area
Net sales	32,799	34,700	66,674	70,871
ID Solutions
Net Sales by Segment and Geographic Area
Net sales	205,362	209,205	420,349	427,304
ID Solutions | Americas
Net Sales by Segment and Geographic Area
Net sales	137,909	138,324	287,271	284,114
ID Solutions | Europe
Net Sales by Segment and Geographic Area
Net sales	45,319	47,282	88,701	96,110
ID Solutions | Asia-Pacific
Net Sales by Segment and Geographic Area
Net sales	22,134	23,599	44,377	47,080
Workplace Safety
Net Sales by Segment and Geographic Area
Net sales	71,303	73,221	143,263	148,318
Workplace Safety | Americas
Net Sales by Segment and Geographic Area
Net sales	23,636	24,332	47,939	49,083
Workplace Safety | Europe
Net Sales by Segment and Geographic Area
Net sales	37,002	37,788	73,027	75,444
Workplace Safety | Asia-Pacific
Net Sales by Segment and Geographic Area
Net sales	$ 10,665	$ 11,101	$ 22,297	$ 23,791