Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 31, 2013
Goodwill [Line Items]
Balance as of July 31, 2013	$ 617,236
Translation adjustments	7,684
Goodwill, Purchase Accounting Adjustments	(755)
Balance as of October 31, 2013	624,165
Goodwill, Period Increase (Decrease)	6,929
Id Solutions [Member]
Goodwill [Line Items]
Balance as of July 31, 2013	517,030
Translation adjustments	3,956
Goodwill, Purchase Accounting Adjustments	(755)
Balance as of October 31, 2013	520,231
Workplace Safety [Member]
Goodwill [Line Items]
Balance as of July 31, 2013	100,206
Translation adjustments	3,728
Balance as of October 31, 2013	$ 103,934