Segment Information - Schedule of Segment Reporting Information By Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2015	Oct. 31, 2014
Segment Reporting Information [Line Items]
Sales to External Customers	$ 283,073	$ 310,240
Segment Profit	56,668	59,006
ID Solutions [Member]
Segment Reporting Information [Line Items]
Sales to External Customers	196,327	212,097
Segment Profit	40,004	43,467
Workplace Safety [Member]
Segment Reporting Information [Line Items]
Sales to External Customers	86,746	98,143
Segment Profit	$ 16,664	$ 15,539