Segment Information Segment Profit (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2021	Jan. 31, 2020
Segment Profit
Segment profit	$ 42,463	$ 46,110	$ 90,730	$ 93,710
ID Solutions
Segment Profit
Segment profit	39,000	40,655	79,279	83,098
Workplace Safety
Segment Profit
Segment profit	$ 3,463	$ 5,455	$ 11,451	$ 10,612