Segment Information - Schedule of Segment Reporting Information By Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2016	Apr. 30, 2015
Segment Reporting Information [Line Items]
Sales to External Customers	$ 286,816	$ 290,227	$ 838,519	$ 883,095
Segment Profit	60,204	53,906	167,269	161,407
Id Solutions [Member]
Segment Reporting Information [Line Items]
Sales to External Customers	196,953	200,786	578,160	604,948
Segment Profit	46,445	41,614	123,451	120,800
Workplace Safety [Member]
Segment Reporting Information [Line Items]
Sales to External Customers	89,863	89,441	260,359	278,147
Segment Profit	$ 13,759	$ 12,292	$ 43,818	$ 40,607