Fair Value Measurements - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2013	Jan. 31, 2014	Jul. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Disposal Group, Including Discontinued Operations, Loss (Gain) on Write-down	$ 15,658
Goodwill		615,404	617,236
Long Term and Short Term Debt, Fair Value		280,501	288,055
Long Term and Short Term Debt, Carrying Value		264,327	262,414
Line of Credit Facility, Maximum Borrowing Capacity		441,000
Notes payable		23,946	50,613
Workplace Safety Americas [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill			183,146
Estimated implied fair value			10,866
Indefinite-Lived Trade Names			25,449
Estimated Fair Value Indefinite Lived Tradenames			14,881
Id Solutions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill			18,225
USD-Denominated Borrowing Credit Revolver [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes Payable		9,000
Notes Payable		39,000
USD-denominated credit facility China [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable		$ 14,946