Segment Information - Schedule of Segment Reporting Information By Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014	Apr. 30, 2013
Segment Reporting Information [Line Items]
Sales to External Customers	$ 309,577	$ 302,483	$ 908,301	$ 847,200
Operating Income (Loss)	26,767	30,935	74,802	95,968
Segment Profit	59,073	70,240	180,608	200,892
Id Solutions [Member]
Segment Reporting Information [Line Items]
Sales to External Customers	206,448	197,417	610,726	528,044
Segment Profit	44,302	46,787	132,795	126,011
Workplace Safety [Member]
Segment Reporting Information [Line Items]
Sales to External Customers	103,129	105,066	297,575	319,156
Segment Profit	$ 14,771	$ 23,453	$ 47,813	$ 74,881