Segment Information Segment Profit (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2020	Jan. 31, 2019
Segment Profit
Document Fiscal Year Focus			2020
Segment profit	$ 46,110	$ 42,518	$ 93,710	$ 89,621
ID Solutions
Segment Profit
Segment profit	40,655	37,857	83,098	79,419
Workplace Safety
Segment Profit
Segment profit	$ 5,455	$ 4,661	$ 10,612	$ 10,202