Segment Information - Schedule of Segment Reporting Information By Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2016	Oct. 31, 2015
Segment Reporting Information [Line Items]
Sales to External Customers	$ 280,176	$ 283,073
Segment Profit	39,518	34,813
ID Solutions [Member]
Segment Reporting Information [Line Items]
Sales to External Customers	201,264	201,020
Segment Profit	33,068	25,431
Workplace Safety [Member]
Segment Reporting Information [Line Items]
Sales to External Customers	78,912	82,053
Segment Profit	$ 6,450	$ 9,382