Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 31, 2014
Goodwill
Balance as of July 31, 2014	$ 515,004
Goodwill, Translation Adjustments	(13,210)
Balance as of October 31, 2014	501,794
Id Solutions [Member]
Goodwill
Balance as of July 31, 2014	412,289
Goodwill, Translation Adjustments	(8,205)
Balance as of October 31, 2014	404,084
Workplace Safety [Member]
Goodwill
Balance as of July 31, 2014	102,715
Goodwill, Translation Adjustments	(5,005)
Balance as of October 31, 2014	$ 97,710