Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Apr. 30, 2015
Goodwill [Roll Forward]
Balance as of July 31, 2014	$ 515,004
Goodwill, Translation Adjustments	(36,969)
Balance as of April 30, 2015	478,035
Id Solutions [Member]
Goodwill [Roll Forward]
Balance as of July 31, 2014	412,289
Goodwill, Translation Adjustments	(24,627)
Balance as of April 30, 2015	387,662
Workplace Safety [Member]
Goodwill [Roll Forward]
Balance as of July 31, 2014	102,715
Goodwill, Translation Adjustments	(12,342)
Balance as of April 30, 2015	$ 90,373