Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Apr. 30, 2014
Goodwill
Balance as of July 31, 2013	$ 617,236
Goodwill, Purchase Accounting Adjustments	(2,168)
Translation adjustments	5,930
Balance as of April 30, 2014	620,998
Goodwill, Period Increase (Decrease)	3,762
Id Solutions [Member]
Goodwill
Balance as of July 31, 2013	517,029
Goodwill, Purchase Accounting Adjustments	(2,168)
Translation adjustments	2,202
Balance as of April 30, 2014	517,063
Workplace Safety [Member]
Goodwill
Balance as of July 31, 2013	100,207
Goodwill, Purchase Accounting Adjustments	0
Translation adjustments	3,728
Balance as of April 30, 2014	$ 103,935